Liqwd Inc & Anor v L'Oréal (UK) Ltd & Anor

This is a patent case about hair care products. The patent is UK patent GB 2 525 793 entitled “Keratin treatment formulations and methods”. The patent was granted on 2^nd November 2016 following an application made on 15^th May 2015 claiming priority from US filing 61/994,709 dated 16^th May 2014. The patent belongs to the first claimant. The second claimant is the exclusive licensee. The claimants can be referred to together as Olaplex.

Olaplex makes and sells hair products including a product called Olaplex No. 1 Bond Multiplier. The key ingredient in Bond Multiplier is a diamine salt of maleic acid. Sales of Bond Multiplier have grown dramatically since the product was launched in June 2014. It sold $100 million worth of sales in its first year. Olaplex Bond Multiplier has had extensive coverage in the press and has been used by many female celebrities. The defendants (L’Oréal) sell a product called Smartbond Step 1. It contains maleic acid too, albeit not in the same form as in Bond Multiplier. Olaplex says that L’Oréal first attempted to buy the Olaplex business but has now chosen to adopt the patented ingredient. Whether that is so has no bearing on the issues I have to decide.

Olaplex contends that L’Oréal’s Smartbond infringes the patent. L’Oréal denies infringement and contends the patent is invalid. L’Oréal also seeks a declaration of non-infringement relating to an alternative formulation of Smartbond. In response to the validity attack Olaplex has applied to amend the patent in various ways.

Claims 1 and 11 of the patent as granted are in this form:

The chemical formula shown in these claims is maleic acid. There are issues of claim construction. The main two are the scope of the term “providing bleached hair” and a point about the chemical formula along with the reference to simple salt. The bleached hair point is whether the term refers only to the process of hair lightening which changes the colour of hair by oxidation but does not involve hair dye or whether it also includes a process of hair dyeing using oxidation dyes, which does involve some use of bleaching agents but also involves dye. The real importance of this issue is about prior art. L’Oréal relies on a prior Korean patent application known as Kim (publication number PAT 2003-0003970). Kim discloses using maleic acid and derivatives of it in a process using oxidation dyes. If the Olaplex claims cover using oxidation dyes then they have a problem of lack of novelty (although there may be dependent claims which are novel). If the claims are limited to bleaching without dyeing then the issue is one of obviousness.

The issue about the formula and simple salt engages issues of construction, priority, amendment and infringement. In its form as granted the claim refers to maleic acid (by the formula) or a simple salt thereof. L’Oréal contends that claims are not entitled to priority because “simple” salt is not in the priority document. If the claims lose priority then they are all invalid because Olaplex’s Bond Multiplier product was made available to the public between the priority date and the filing date of the patent in suit. Olaplex does not accept the granted claims are not entitled to priority but offers an unconditional amendment to remove the reference to a simple salt. Accordingly in its opening skeleton Olaplex did not get into the detail of what simple salt meant. Olaplex contended that the unconditionally amended claims, with the reference to simple salt struck through, relate to any relevant chemical system containing the species which maleic acid produces in solution. It is not limited to the undissociated form of maleic acid depicted in the formula essentially because the skilled person would be well aware that when maleic acid was put into aqueous solution, it would dissociate into ions such as maleate ion and hydrogen maleate. The equilibrium would be determined by the pH.

Now Olaplex’s submission about the scope of the claim may be right or wrong but starting at the amended claim risks leading to trouble. That is because one of the objections raised by L’Oréal to the amendment is a question of extension of scope. If one starts by focussing on the granted claim, the reference to the maleic acid formula or a simple salt thereof could be understood by the skilled person as an attempt by the patentee specifically to limit the claim only to maleic acid itself or only simple salts and not, for example, forms of maleic acid derivatives which are neither maleic acid nor simple salts or to maleate ions however formed. And if that is right then the construction of the amended claim advanced by Olaplex could be seen as making it wider in scope than the granted claim. But that is forbidden by s76 of the Patents Act, implementing Art 123(3) of the European Patent Convention. Tangled up with all this are questions raised by an alternative formulation of the L’Oréal Smartbond product the subject of a claim for a declaration of non-infringement. Whereas the Smartbond formulation alleged to infringe includes maleic acid and ethanolamine as distinct species, in the alternative formulation the species is a salt – ethanolamine maleate. The debate is also illustrated by a question of whether Olaplex’s own Bond Multiplier formula is within the claim. The diamine salt in the formulation may not be a simple salt. A further dimension to this general issue is about amendments to the specification. Usually when claims are amended, there may need to be corresponding amendments to the specification. They are normally not controversial but they can be when an issue of construction like this arises.

The way to resolve these issues will be to start in the right place (the granted patent including the claims as granted) and work from there.

Aside from these issues there are three more validity attacks. L’Oréal relies on the description of a hair lightening product called Catzy. This was published before the priority date. It included maleic acid as an excipient. Known uses of maleic acid as an excipient were as a buffering or chelating agent. The amount of maleic acid in the Catzy formulation is not stated in the published material (although it is now known). There is a question of claim construction whether the claims would cover such a formulation in any event. Olaplex also relies as a fall back on dependent claims which involve ranges specifying the amount of maleic acid in the formulation.

L’Oréal relies on a s2(3) citation WO 2015/017768 A1. This is a published international patent application under the PCT made by Liqwd Inc. I will refer to it as WO 768. It was published on 5^th February 2015 and designates the United Kingdom. The WO 768 application was filed on 1^st August 2014 claiming priority from a series of US filings, most of which were before the claimed priority date of the patent in suit. Therefore although WO 768 itself was filed after the claimed priority date of the patent in suit, matter disclosed within it may be entitled to a priority earlier than the patent in suit. L’Oréal refers to example 8 of the published application. If the matter disclosed by that example is entitled to a priority date before 16^th May 2014 then it is prior art against all claims. As a s2(3) citation WO 768 is only relevant for novelty, not inventive step.

The other major issue in the case is prior use. It is not in dispute that before the 15^th May 2014 priority date, Olaplex distributed its Bond Multiplier product to some hair care professionals in California and elsewhere in the USA. Most of the hair care professionals are referred to as colorists. It is convenient to use that term and to use the US spelling since that is how they refer to one another.

If the distribution to the colorists made the contents of the product available to the public then the patent is invalid. L’Oréal contends that it did and refers to extensive social media posts by the hair professionals promoting the product, promoting its use on celebrities, and saying how wonderful it was. Initially Olaplex took two points. The first was and is that this distribution exercise was part of testing the product and that the recipients were not told what the secret formula was and were not free to analyse it or to give it away. So information about the contents was not made available to the public. The fact that this also created a social media buzz (which was intended too) does not make any difference. The second argument was that L’Oréal’s attempt to show that analysing the product would inform the skilled person of the identity of the crucial ingredient failed to reach the relevant legal standard. That second point was abandoned at trial after further evidence about the analyses was served.

The expert witness called by Olaplex is Professor David Haddleton. He is Professor of Chemistry at Warwick University and Adjunct Professor at Monash University (Pharmacy and Materials Engineering). The current focus of his work at the University of Warwick is on polymers for healthcare and therapeutics, and controlled free radical polymerisation. He has also worked extensively with industry on various consumer products including hair care products. He has done a lot of work with Unilever and also worked with L’Oréal.

L’Oréal criticised Prof Haddleton, submitting that his evidence should be treated with caution. L’Oréal is correct that Prof Haddleton had much less practical hands on experience of oxidative dyeing, hair bleaching and the formulation of such products than L’Oréal’s expert Dr Hefford. I will take that into account. L’Oréal submitted that his first report had not been prepared with diligence and showed his lack of expertise. I will refer to two matters. Prof Haddleton’s first report contained a fundamental error about the way oxidative dyeing works which the professor had picked up from a passage in the patent. He did correct it in a later report but the fact the error was made at all is indicative of the limits of the Prof Haddleton’s expertise in this field. Someone with substantial actual experience in this field would have been immediately puzzled by the passage the professor relied on.

The second matter arose from a passage in the professor’s first report in which he said “The solution described in the patent is not one that occurred to me when I considered what would be obvious for the skilled person starting from the prior art”. In his report as written this statement was made in a context in which he had been given the prior art but not the patent. It therefore makes sense. It is not really expert evidence at all. It is really evidence of fact, apparently recording that Prof Haddleton considered the prior art before he ever saw the patent, thought about what might occur to him over that prior art in circumstances necessarily devoid of hindsight – since he had not seen the patent – and did not think of the solution described in the patent. In other judgments I have questioned the utility of this sort of evidence but in any event its clear purpose was to support Olaplex’s case that the patent is not obvious from the prior art.

However it turned out that the professor had made an error in relation to the circumstances in which he had been given documents by Olaplex’s lawyers. In fact at the time this sentence is referring to he had already seen the patent as well. If that is

I will take both these points into account when considering the weight to be attached to Prof Haddleton’s views. I reject the submission that I should treat all his evidence with caution.

L’Oréal’s main expert was Dr Robert Hefford. Dr Hefford is a chemist and worked in industry for a number of years. He was at Unilever from 1977-1989, where he worked on the research and development of hair products and skin products. Dr Hefford then moved to the UK Clairol Division of Bristol-Myers until 2002, where his role moved from concentrating on formulations to covering all aspects of product development. Since 2002 Dr Hefford has been a consultant to the cosmetics and haircare industries.

Olaplex submitted that the evidence Dr Hefford had given in parallel US proceedings about the same invention and the Kim prior art meant that his ability to put himself in the position of the unimaginative skilled person simply reading Kim with interest was massively prejudiced. I reject that. Experts in patent cases know, and Dr Hefford certainly did, that even though the case is conducted ex post facto, the ultimate task is to decide without hindsight what the unimaginative skilled person would do (if anything) given the prior art. That is why the law has developed methods for assessing obviousness which aim to identify and remove hindsight. The task is not easy but it is not made any harder just because the expert has considered the invention and the prior art in detail in evidence for the American court.

L’Oréal also called Professor Robert Law. He is Professor of Biological Materials at Imperial College London. He collaborates with the Department of Materials, Chemical Engineering and Cell and Molecular Biology, and has successfully established an interdisciplinary research centre for solid state NMR at Imperial College London. His evidence was about what a skilled analytical chemist would do if a formulator of hair care products asked him or her to identify what a product contained, assuming it came with no ingredient list.

Olaplex also called fact evidence from a number of individuals. The fact witnesses who gave oral evidence and were cross examined were:

Mr Alexander, Ms Lim, Ms Laris and Ms Vaught gave evidence by video link to the USA.

Olaplex also relied on fact evidence from a number of individuals under Civil Evidence Act hearsay notices. Alan Gold and Gina Monaci are colorists who gave witness statements about the prior use. They were unable to attend trial. Tracey Cunningham gave a short witness statement stating that she did not wish to give evidence in this case. She has relationships with both Olaplex and L’Oréal.

L’Oréal also called evidence from Rachel Boakes, an associate at L’Oréal’s solicitors Baker McKenzie. Her evidence arose from efforts by both herself and another solicitor at the firm to speak with potential witnesses about the prior use of Olaplex’s Bond Multiplier. She was cross-examined briefly on that evidence.

L’Oréal called Frederic Legrand to verify the Product and Process Description of Smartbond. He was cross-examined about a table in the Alternative PPD. Olaplex submitted he gave inconsistent evidence about responsibility for it and submitted that he was apparently ignorant of “basic chemistry”. I do not agree. The explanation for the point on the table was that M. Legrand was not inconsistent. At worst there was a simple misunderstanding, probably caused in part by the existence of a PPD which he had signed and an Alternative PPD which he had always made clear he had not signed. The point on salt was that the questioner put to him a question which was far from basic chemistry. The question was not a general one about salts per se, it was a particular one about whether, at the particular pH of the formulation which includes ethanolamine maleate, the salt was solely in the form of dissociated ions. M. Legard’s answer meant he was simply saying that he did not know whether the material entirely dissociated. The point was not explored further with M. Legrand. However there was an issue in this case, as no doubt M. Legrand was aware, about the true extent to which molecules fully dissociate at different pHs. There was also evidence that maleic acid itself (rather than ethanolamine maleate) is not entirely dissociated at pH 3. And there was an issue on one view of claim construction about whether that mattered for infringement. In my judgment M. Legrand was a good witness seeking to help the court. He was a fluent English speaker but it is not his mother tongue.

Finally, L’Oréal relied on evidence from two scientists who had performed analyses on a sample of Olaplex material in order to show what information about the prior used formulation might be made available to the public. They were Dr Shen Luk and Dr Huw Williams. Dr Luk is Chief Scientific Officer at Juniper Pharma Services

In this case the person skilled in the art is a team.

The patent is addressed to a team responsible for producing and developing hair-care products. The principle member of the team would be a chemist/formulator with experience developing hair treatments. This person would have an undergraduate degree in chemistry or a related field and either a relevant PhD and a few years’ experience developing, formulating and testing hair care products or no PhD and more years’ experience. When considering the issues of construction I will refer to the skilled team as the skilled reader.

If relevant the team would also include an analytical chemist to determine the composition of a sample of an unknown product.

The relevant common general knowledge relates to hair, hair treatments and chemistry.

Hair is mostly made of keratin, a naturally occurring polymer of amino acid monomers. A strand of hair has three components known as the cuticle, the cortex and the medulla. A representation of a hair strand is:

The cuticle forms an outer protective sheath which can act as a barrier to protect the cortex, and minimise friction between hair fibres. It controls the movement of molecules/chemicals between the fibre’s central regions and the outside environment, including moisture and vice versa. The cuticle has lipids bound to its surface by thioester bonds, which give the hair natural shine and a soft feel.

The cortex provides hair with its strength. It contains nested longitudinal bundles of keratin fibres and melanin granules. Melanin is responsible for the hair’s natural colour. The cortex does not have a great deal of lateral strength; part of the function of the cuticle is to hold the fibres of the cortex together.

The medulla is a central region normally found in thick hair. It is not always present in hair. Naturally blonde and fine hair generally does not have a medulla.

Keratin proteins are the major contributor to hair strength at a molecular level. Keratin has a high level of cysteine residues that result in disulphide crosslinking throughout the hair. These crosslinks are formed by the two cysteine side chains which have thiol (-SH) groups reacting to form cystine (also known as a cysteine bridge), which has a disulphide (-S-S-) bond between the two chains. Going from the thiols to the disulphide is an oxidation reaction while going from the disulphide to the thiols is a reduction reaction:

Hair damage is a complex process. Hair damage can arise from both chemical and mechanical processes. Recognised sources of damage are from reducing agents (for example in perms), from oxidising agents (such as in bleaching), from the deposition of dye in the cuticle of the hair fibre, from mechanical processes such as grooming (brushing, combing, drying), and from heat treatment.

One of the most common ways to bleach hair is by the destructive oxidation of the chromophores in melanin, by applying a bleaching mixture. The chromophores are the groups of atoms in the melanin molecules responsible for giving the colour.

As mentioned already, one of the issues in the case involves considering two methods of changing the colour of hair. I will call one well known method “hair lightening” because it changes the colour of hair by oxidation but does not involve hair dye. The other well known method is a process of dyeing hair using oxidation dyes. There are other methods of changing hair colour involving dyes which are not oxidation dyes.

The mixture used for hair lightening principally comprises an oxidising agent such as hydrogen peroxide and a further material such as a persulfate. The further material can be called variously a bleach booster or accelerator. The mixture is applied at an alkaline pH. This is a very common way of changing the colour of hair. It involves no dye at all. The colour change comes entirely from the process of bleaching or oxidation. If all the colour is removed the result is a silver white colour – hence the term peroxide blonde.

The cuticle of the hair was known to open and swell in treatment with a high pH, causing the permeability of the cuticle to increase. This facilitates the entry and diffusion of chemicals deeper into the hair, and in particular to the cortex to allow penetration of, for example, hair dyes. The side effect of this is that the hair can become less hydrophobic, especially when natural oils are removed by chemical processes. There is also an increase in the amount of swelling due to ingress of moisture when the hair is wet.

While the exact chemical steps involved in the peroxide and persulfate interaction were and are still not well understood, it was known that both were (and are) needed for a bleaching process to work in a practically useful time frame. It was also understood that they need to be kept apart until the point of application to avoid a premature chemical reaction.

The aggressive chemistry used in bleaching causes damage. One source of damage is due to the oxidising agents decreasing the hydrophobicity of the hair fibres. This affects, for example, the binding of the natural oils to the hair, causing the oil to be removed and the hair becoming dry and losing its shine.

In terms of chemical mechanisms, an aspect of damage by oxidising agents was believed to be due to the conversion of the disulphide bond (S-S) to cysteic acid groups (SO₃).

Oxidation dyes are used in the majority of hair dye treatments in the US and Europe. The process uses intermediate colouring agents which require the intervention of an oxidation agent (usually hydrogen peroxide) to react with them in order to produce permanent coloured compounds through oxidative condensation. The chemical processes involved are complex.

The hydrogen peroxide in the formulations could act to oxidise the hair (and therefore cause essentially the same damage as described above for hair lightening). However the extent to which this occurred is in dispute. I find that the skilled person knew, as a matter of common general knowledge, that oxidative damage was something which could occur in oxidation dye systems, especially with repeated dyeing. It was less severe than the damage caused in hair lightening owing to the less aggressively oxidising formulations used in dyeing as compared to those used in hair lightening. So it was known that oxidation could be a cause of damage but looking at the matter the other way round, it was not the case that the skilled person necessarily would assume that any damage seen must have been caused by oxidation rather than having some other cause.

Another related issue is the degree to which the formulations contain an excess of the oxidation agent over and above that needed to oxidise the dye precursor molecules to form the dyes. I find that the common general knowledge was that many formulations did have a substantial excess of hydrogen peroxide but not all such formulations.

It was understood that another thing which happened with the use of oxidative dyes was the deposition of the oxidised dye precursor and product molecules on the cuticle of the hair fibre. This negatively affects the look and feel of the hair and is distinct from any damage that might arise from the oxidative processes.

The damage to hair caused by oxidation was known and those in the art had to deal with it. Professionals tried not to bleach hair too often but that was not always possible. For example actresses in film and television might have to undergo treatments which involved oxidation of hair very frequently.

Conditioners were applied to the hair afterwards. These improved the combability of hair. If one tried to draw a comb through hair which had been oxidised but to which no conditioner had been applied there was a risk of breaking the hair. The conditioner is not acting to actually reduce or prevent the damage to the disulphide bonds themselves but rather to treat the symptoms of that damage. Conditioners were very effective for the period they were on the hair but that was a temporary effect because they wash out when hair is washed and have to be reapplied again and again.

If a hair treatment was being developed the skilled team would test it. A common approach would be to test the prototype product on swatches of hair in a laboratory. One common test is the tensile strength of the hair. Machines from the company Diastron were well known. There is more than one Diastron machine and even in the same machine a tensile test could be set up in different ways. For example a test could be done on wet hair or dry hair. Part of the common general knowledge was that bleaching could weaken the tensile strength of hair when measured with wet hair.

Another kind of testing is consumer testing. There is no doubt that this sort of sensory testing will form part of the testing process. Tensile strength is related to the cortex whereas the condition of the cuticle does not correlate to the tensile strength of the hair. The state of the cuticle is important for consumer perception. An issue is the relative significance of consumer testing results over laboratory tests like tensile strength. I find that the skilled person would find positive results of either kind sufficiently interesting to take forward even if they were reported without the other kind. So good tensile results alone would be worth investigating.

When an acid reacts with a base the result is a salt plus water. In solid form salts are crystalline ionic compounds made up at least one cation (positively charged ion) and at least one anion (negatively charged ion). When the crystals are dissolved in water to make an aqueous solution the crystal lattice is lost and the solution is a mixture of separate cations and anions.

Maleic acid was part of the common general knowledge of the skilled team. It is a diprotic acid, i.e. it has two protons which could dissociate. When one comes off the result is a proton and a hydrogen maleate ion in solution. When the second proton comes off the hydrogen maleate the result is two protons and a maleate ion in solution. Maleic acid has a pK_a1 of 1.94 and pK_a2 of 6.22. Therefore at low pH (e.g. pH 3 or 3.5) the majority ionic species is hydrogen maleate and there will be some undissociated maleic acid; whereas at high pH (e.g. pH 8 or above) both protons will dissociate and the predominant species is maleate ion. In the context of hair care, before the priority date the skilled team would only have been aware of maleic acid’s potential use as a chelating agent or pH buffer/modifier.

Peracids are acids with an [-OOH] group and so are related to hydrogen peroxide [HOOH]. These are strong oxidising agents. The use of peracids as bleaching agents was well known at the priority date.

The field has a number of textbooks which those skilled in this art refer to. The ones referred to in evidence were Chemical and Physical Behavior of Human Hair, 5th Ed. by C.R. Robbins; The Science of Hair Care, 2nd Ed. edited by Bouillon & Wilkinson; Hair and Hair Care, edited by Dale H Johnson and Fundamentals of Human Hair Science Issue 1, by J Alan Swift. Not every line of every textbook represents common general knowledge (nor for that matter is every single statement accurate either) but they provide an important resource.

There was no dispute about the law applicable to the interpretation of patent claims. However given the recent decision of the Supreme Court in Actavis UK Ltd v Eli Lillyand Co [2017] UKSC 48, and subsequent decisions of judges sitting in the Patents Court about it, I will make some brief observations of my own.

Prior to Actavis the approach based on Kirin-Amgen Inc v Hoechst Marion RousselLtd [2004] UKHL 46 was that whatever account was required in law to be taken of equivalents when applying the Protocol to the Interpretation of Art 69 EPC and its equivalent provisions in national law, that was achieved by the process of purposive construction. The Supreme Court in Actavis has decided that that is not the right approach. The scope of protection is now determined by a two stage process. The first stage is a process of construction and then the second stage is the application of a doctrine of equivalents.

An outstanding question has been whether the first stage, also referred to as a process of normal interpretation, is the same as what was previously called purposive construction. Part of the reason this question arises is because in Actavis the questions formulated to be answered in applying the equivalents analysis refer to variants from the “literal meaning” of the claim language. Prior to Actavis a “purposive” approach to construction was intended not to be a purely literal one.

So far the judges of the Patents Court who have had the opportunity to express themselves on the point have unanimously held that the normal interpretation stage required by Actavis is the same as purposive construction (Arnold J in Generics v Yeda [2017] EWHC 2629 (Pat), Richard Meade QC in Fisher & Paykel v Resmed [2017] EWHC 2748 and Henry Carr J in Illumina v Premaitha [2017] EWHC 2930 (Pat)). I agree for the reasons given by those judges. As Henry Carr J put it in paragraph 202 of Illumina, normal interpretation means purposive construction.

I will add two further observations. They are points which at least on one view of the issues in this case might have mattered but in the end did not. The first is about taking equivalents into account in the process of construction. One consequence of KirinAmgen was that account was taken of equivalents in the process of determining what the true purposive construction of the claim was. I will say only that I can see scope for debate about whether, following Actavis, that sort of approach might or might not produce the same result at the normal interpretation stage as would have been arrived at following Kirin Amgen. In other words, construing a patent purposively to identify the normal interpretation in the manner described in those first instance decisions which I do agree with, may not be precisely the same as every nuance of the process of the determination of claim scope which was mandated by Kirin-Amgen prior to Actavis.

The second point is about validity and claim scope. One of the issues involves whether an amendment might extend the scope of protection and therefore be impermissible (or if it had been made already, invalid). This has caused me to think about the relationship between validity and the Actavis approach to claim scope (including the scope determined by the second stage of Actavis as well as the scope produced by the process of normal interpretation). I will say only that I can see room for arguing that for validity purposes some account ought to be taken of the wider scope.

I turn to consider the patent in this case.

The patent starts by explaining that the field of the invention relates to formulations and methods for providing bleached hair (p1 ln3). What that term means is in issue. I will come back to that.

Next in the background section the first line (p1 ln8) refers to hair bleaching as a globally accepted fashion phenomenon. Next (p1 ln9) is a reference to the use of reducing agents to break disulphide bonds allowing for the deeper penetration of the bleaching agents into the hair. This is not correct and the skilled reader would not think it was correct. Reducing agents are used in perming. From this passage onwards there is a muddled section which does mention oxidation but it really focussed on perming. Reactions with the thiols in keratin are mentioned, again in the context of perming.

After this muddled section there are statements setting out what is needed in the art. At p3 ln6 it is stated that “there is a need for hair formulations and treatments that repair and/or strengthen keratin in hair damaged from bleaching treatments” and at p3 ln10 it is stated that “there is also a need for formulations and treatments that can repair damage

At p3 ln13 the patent states that it is an object of the invention to provide improved formulations and methods for repairing and/or strengthening damaged hair. Given their common general knowledge the skilled team would be very interested. The text section goes on to state at line 15 that:

“The present invention provides a method for providing bleached hair which comprises simultaneously applying to the hair a first formulation comprising a bleaching agent and a formulation comprising an active agent as described herein.”

Next is a section called “summary of the invention”. The first paragraph here (p4 ln913) provides:

“Formulations, kits and methods for restoring hair that has been broken during a bleaching treatment are disclosed. The formulations have similar benefits when used with different color chemical processes, such as bleaching, highlights, lowlights, semi-permanent, demi-permanent, and permanent color.”

The skilled reader would not think the first sentence there meant that the patent was suggesting that hair which has actually been broken could be put back together again. The reference to “broken” would be understood most likely either as meaning damaged or as a reference to breaking disulphide bonds.

Each side relied on the second sentence in support of their case on the meaning of “providing bleached hair” in the claims. L’Oréal submitted that the skilled reader would regard permanent colour as a synonym for the use of oxidation dyes. I think the skilled reader would regard oxidation dyes as the paradigm case of permanent colour, and I agree that the skilled reader would understand what is being said here as including a statement that the benefits would be found if the formulation was used with oxidation dyes.

Olaplex submitted the list in the second sentence would indicate to the reader that the inventors distinguished between bleaching and dyeing; and in particular between bleaching and the use of oxidation dyes. L’Oréal submitted that the sentence supported its case that the term “bleached hair” included hair bleached in an oxidation dye process since the invention is said to work for colouring chemical processes in general and in particular including permanent colour (i.e. oxidation dyeing).

As I have said L’Oréal is correct that the passage would be understood to assert that the invention will work in an oxidation dyeing process. That would mean that the reader would not be surprised if a claim was made to a method which included oxidation dyeing. However the reader would also see that this passage shows what the inventors are using words to mean. Here a distinction is being drawn between bleaching and (for example) permanent colour; in other words between bleaching and oxidation dyeing. They are both kinds of colour chemical process – which is correct because they both

The next passage in the patent states:

“The methods disclosed herein use active agents to repair the hair; these active agents are washed from an individual’s hair on the same day that they are applied to the hair. Under the same conditions, such as temperature and moisture, hair treated with the formulations disclosed herein takes a longer time to revert to its prior state as compared to the same hair that is treated with hydrogen peroxide.

The formulation is applied at the same time as the hair bleaching treatment.”

The reference to the hair which has been treated reverting to its prior state is puzzling but nothing turns on it.

Next the detailed description starts at p5 with an uncontroversial series of definitions (section I). The organisation of the next section in the document from p10 on to p30 is confusing. At page 30 is the first example – numbered Example 2. There is no example 1 even though an example 1 is referred to in some of the later examples.

At p11 is a statement that the formulations and methods in the patent are to treat keratin in hair and may reduce to prevent hair damage due to hair bleaching processes. At p11 ln7 is a statement that the formulations contain maleic acid or a simple salt thereof. The sentence then defines “active agents” as those. A similar statement is made on p12 albeit the structural formula for maleic acid is used instead of the name in words.

Wide pH ranges (about pH 3 to about pH 12, preferably pH 5 to pH 8) are given. Wide ranges are stated for the weight % (wt%) active agent. The widest wt% is from 0.01 wt% to about 50 wt%. (More figures for wt% are given at p22.) Excipients are listed from p13 and include wide ranges for the wt% of the excipients. Forms of the formulation are described such as sprays, conditioners, shampoos, creams and liquid active agent formulations.

Methods of use are discussed at p22. The method involves applying a colouring formulation to the hair which may be a highlighting formulation made from mixing bleach powder and developer. The application of the active agent is described at p23 onwards. At the end of this section at p25 ln6 is the following:

“The formulation described herein improves hair quality, such as appearance (e.g., sheen) and feel, and decreases hair breakage when the hair is subjected to treatments, such as coloring or permanent waving.

In some embodiments, hair breakage decreases by 5, 10, 15, 20, 25, 30, 35, 40, or 50% or higher after treatment with the active agent compared to untreated hair from the same individual. Hair breakage is a significant problem encountered during coloring and other treatments.”

Next, on p25 at line 10, is a section about perming and reducing agents. Again it is a bit confusing but it is entitled “B Reference – Chemical treatment of hair with a reducing agent”. The reader would understand the word “Reference” indicates that this text is not purporting to describe something within the claims. Another “Reference” section starts at p27 line 18 about applying active agents to skin or nails. Then a “kit for treating hair” is described from p28-29. One possibility is that the active agent is provided as a dry powder (p22 ln10-11).

The examples start at p30 with example 2. Examples 2, 4, 5, 6, 7 and 8 are all labelled Reference.

The only example of what is claimed is example 3. It describes taking two swatches of hair from the same head. The hair was medium brown. Both swatches were lightened using a developer and powder bleach. With Swatch 1 the active agent formulation was added, with Swatch 2 it was not. The active agent formulation contained maleic acid at a concentration of 2.0g in 10g water. Confusingly the reference to the active agent formulation refers to example 1 and to concentrations (plural) but nothing turns on that.

The products were applied with a brush as the hair lay on aluminium foil. This is like a highlighting process.

The patent explains that after the process “a noticeable difference in hair quality … was observed”. The hair treated with the active ingredient was “softer, less frizzy, appeared hydrated with more shine”. Both swatches were washed and treated 5 more times “with the same noticeable benefits” of the treated sample as opposed to the control.

L’Oréal points out that the analysis in this example is subjective and has no statistics. That is true. Nevertheless the skilled reader would take this result at face value and would be interested in it. It is indicative that something beneficial is taking place.

Although not relevant to construction, it is convenient at this stage to note that using after acquired knowledge we now know today that the invention does work. To the extent it matters, it is legitimate to take that knowledge into account since (I find) the disclosure in the patent renders the invention plausible despite the thin nature of Example 3. Dr Hefford noted that the invention does “do something”.

Claim 1 calls for a method which is for providing bleached hair. That means it is a method suitable for achieving that result. Two formulations are defined, one with a bleaching agent and the other with the active agent. The bleaching agent could be hydrogen peroxide but need not be.

There is a point on the terms “active” or “active agent” but that is best addressed in context (Catzy).

The claim does require two formulations to be produced but they are then applied to the hair simultaneously. I suppose that means they could be applied separately but at the

Claim 11 is a claim to the use of an active agent defined in the same way as claim 1. The active agent is used simultaneously with a bleaching agent. The active agent is used “to reduce or prevent hair damage due to a treatment to provide bleached hair”. The reference to providing bleached hair would be understood in the same way as in claim 1.

The achievement of the result of reducing or preventing damage (etc.) is a functional technical feature of claim 11. That may well involve examining the state of mind of the person formulating a maleic acid treatment and putting it in a bottle to sell, the state of mind of the person selling the product and/or the state of mind of the colorist or consumer using the product. However nothing turns on that in this case.

The first issue is about providing bleached hair. Read in context and with the common general knowledge I find this means a process of lightening hair. It is true that the patent uses the term colouring to refer to processes which involve bleaching alone and also dyeing but “colouring” is not the word used in the claim. The reader would understand the inventors to have used the words “a method for providing bleached hair” as a reference to a hair lightening process. That is at least a (if not the) natural meaning of those words. The reader would also see that if the inventors had wanted to cover both hair lightening and colouring using dye they could simply have used the word colouring (or “a method for providing coloured hair”). It is noticeable that the inventors did not do that. In context “bleached hair” would be understood to refer to hair that has been the subject of a hair lightening process. It would not be understood to refer to hair dyed using oxidation dyes even though the skilled reader understands perfectly well that strictly speaking the hair produced at the end of an oxidation dye process has also been subject to bleaching at least to some extent.

It is also true that the patent teaches that the invention would work in an oxidation dyeing process and the skilled reader would see that since the invention seems to work by ameliorating chemical damage caused by oxidation, it is likely to work to some extent also when oxidation dyes are used, since those methods do involve some oxidation of the hair. However this does not justify reading the words of claim 1 as if they include an oxidation dyeing process.

I do not believe anything turns on the fact that the claim does not refer to an accelerator or booster.

The same conclusion follows for claim 11.

In terms of construction there is no relevant difference between the words “maleic acid” and the formula shown in unamended claim 1.

The skilled reader would understand that strictly speaking maleic acid – and the formula – refer to a chemical compound in which the two hydrogens (protons) are bound to the oxygens in the carboxylic acid groups. The skilled reader would also understand that as soon as maleic acid was dissolved in water, the molecule would dissociate and the species present would depend on pH. The skilled reader would also expect that the thing which actually mattered as far as achieving a relevant effect on the hair is concerned was one or both of the ions forms, hydrogen maleate and maleate. If they had to distinguish between the two ions (I do not believe it matters) they would think the maleate was the relevant ion since that will predominate at high pH and high pH represents the conditions when the bleaching takes place.

So there are two feasible constructions of the term maleic acid. One is limited strictly to the un-ionised molecule and the other includes that molecule and the ions it forms in aqueous solution. I will refer to these two as Meanings A and B respectively. It is clear that out of context the skilled person could interpret that term either way but it is also clear that in general, in the context of aqueous systems, the skilled person would favour Meaning B.

Turning to “simple salt”, that term also has multiple possible meanings. Focussing first on the word salt, rather like maleic acid, that term could refer to the undissociated form only (in effect the ionic crystalline solid) or it could include a solution in which the anion and cation which were together in the solid form of the salt are in solution. Either is tenable. Just thinking about table salt, the term can refer to the white powder but one can also refer to a salt solution.

Focussing on the term “simple” or “simple salt”, neither is commonly used in hair care. Dr Hefford suggested the following. The opposite of a simple salt could be a double salt such as NaKCl₂ which as a solid would have a different lattice from either NaCl or KCl. Or the opposite could be a complex salt in the sense of a salt in which one of the ions is a complex such as the hexaminecobalt ion made up of a cobalt atom and six amine elements in hexaminecobalt (III) chloride. Another possibility raised by Dr Hefford was that a complex salt meant that the ion made more than one atom but I reject that one.

Yet another approach is to interpret the reference to simple salts of maleic acid as an attempt to draw a distinction between salts of maleic acid in which the counter ion has some structural feature or functional group which the skilled person would expect to perform a significant function or affect the way the invention works as compared to maleic acid itself. So for example if the counter ion acted as a linker molecule which affected the way the maleic acid worked, maybe the salt of the maleic acid plus that counter ion was not a simple salt. A simple salt would be one in which the counter ion had no such effect. I will call this construction the non-functional counter ion construction. This construction of simple salt was advanced by Olaplex in its statements of case (see paragraph 3 of the Claimants’ Amended Reply Statements of Case on Validity (KR790, WO768 and CATZY)), cross-referred to in paragraph 4 of the equivalent statement of case relating to the prior use. This latter statement of case advanced Olaplex’s case that the prior used maleic acid diamine salt was not a simple salt.

However at trial Olaplex submitted that the correct construction of maleic acid was Meaning B and the correct construction of salt was as a reference to the undissolved solid. The consequence of Meaning B would be that any salt of maleic acid, once it

The potential tangles caused by this construction are tolerably clear although complicated to explain. If simple salt bears the non-functional counter ion construction then the reference to maleic acid in the composite expression “maleic acid or a simple salt thereof” makes more sense bearing Meaning A than it does bearing Meaning B. That is because the non-functional counter ion construction of simple salt is inconsistent with the wider Meaning B of maleic acid. So on that basis, the composite expression “maleic acid or a simple salt thereof” in which Meaning A applies would therefore encompass the undissociated maleic acid molecule and also maleate or hydrogen maleate ions but only when those ions do not have a functional counter ion. And on that basis, for example, the prior used diamine salt would fall outside claim 1 altogether because it was neither undissociated maleic acid nor did it have a non-functional counter ion. So far so good but there is a problem. Amending to delete “simple salt” from claim 1 leaves the claim just with the reference to maleic acid. Without the term “simple salt”, the skilled person would favour Meaning B for maleic acid. So claim 1 as amended would encompass the prior used diamine salt. But that kind of extension of scope by amendment is forbidden by Art 123(3) EPC and s76 of the 1977 Act. And it could get even more complicated if one considers equivalents. If after amendment the term maleic acid remains construed as Meaning A, perhaps nevertheless the diamine salt, while not within the normal construction of Meaning A, would still satisfy the second stage of the Actavis analysis as an equivalent? Whereas it would not have satisfied that second stage based on the un-amended claim because it was expressly excluded by the non-functional counter ion construction of simple salt.

Despite this potential complexity, in the end I believe the issues are relatively straightforward to resolve if one comes back to basic principles and reads the claim through the eyes of the skilled reader and in the context of the patent as a whole. The skilled reader would see that the formulations used in the invention are largely aqueous (although they do not have to be). They would favour Meaning B for the term maleic acid. In other words they would think the inventors by using that term intended to mean both the undissociated molecule and the maleate and hydrogen maleate ions. The term simple salt has no well defined meaning for the skilled reader. The idea that it has something to do with functional counter ions would never occur to them. Given the width of Meaning B, they would think salt referred to the solid form of the material and this is consistent with the idea that the active agent could be in powder form (p22 ln 10 of the specification). Therefore the composite phrase “maleic acid or a simple salt thereof” would make sense as including a formulation in solution in which there could be undissociated maleic acid species and/or maleate and hydrogen maleate ions and

Accordingly the prior used formulation of the diamine maleate salt would fall within claim 1 in its granted form and amending to delete the reference to simple salt has the effect of narrowing the scope of the claim. It does not have the effect of extending the scope of protection.

The same conclusion follows for claim 11.

By closing Olaplex relied on claims 1, 3, 4 and 11 as being independently valid.

Claim 3 adds a limitation that “the first formulation and the second formulation are mixed at the time of use and prior to application”. Claim 4 limits the amount of active agent in the mixture applied to the hair to the range 0.1 – 50 wt%.

Four sets of amendments had been proposed. The first set were advanced unconditionally to delete “or a simple salt thereof” from claim 1 and 11. On the construction I have reached of claim 1 this deletion does not extend the scope of protection. Olaplex proposed that the right way to bring the specification into conformity with that amendment was to delete the same words from page 11 (line 7) and page 12 (line 11). I agree. I will therefore allow that amendment in that form.

The second, third and fourth sets of amendments were conditional, intended to cure various kinds of invalidity if contrary to Olaplex’s case, the relevant attack succeeds. By closing only the second one, Fall Back 2, was pressed. I will refer to it as Fall Back 2 to maintain consistency with the terms used in the trial bundles.

Fall back amendment 2 changes claims 1 and 11 as follows:

There is no formal objection to this amendment (over and above the arguments about the deletion of simple salt). The point of the amendment really applies if providing bleached hair were to be construed as including a dyeing process. By requiring both a bleaching agent and a developer the claim does not cover conventional dyeing formulations irrespective of the scope of providing bleached hair because although those dyeing formulations include hydrogen peroxide they do not include persulfate developer. Therefore even if unamended claim 1 lacked novelty over Kim on the construction of providing bleached hair which included dyeing, this claim is novel over Kim.

The relevant ingredients of L’Oréal’s Smartbond product are maleic acid and ethanolamine. The product description gives the pH of the formulation as 3 ±0.2. At that pH the maleic acid in the formulation will mostly be in the form of hydrogen maleate, with some undissociated maleic acid. Therefore Smartbond is a means relating to an essential element of the invention claimed in claims 1 and 11 (unamended and unconditionally amended). That conclusion also applies to claim 3 (the product falls within the wide wt% range) and claim 4 (no point arose on the way the product would be used or the directions for use).

At this stage I can also deal with the alternative formulation the subject of L’Oréal’s application for a declaration of non-infringement. In the alternative formulation the two ingredients maleic acid and ethanolamine are put together to form a salt before being dissolved to make the formulation. This might have been relevant on different constructions of unamended claim 1 but as I have construed the claim the issue does not arise. This alternative approach would infringe.

Claims 1 and 11 of the Fall-Back 2 amendments introduce two features. No issue arises relating to the fact the bleaching agent comprises bleach powder and developer. The other feature places a lower limit on the pH of the “second formulation”, i.e. the one containing maleic acid. L’Oréal contended that since the formulation was described in the product description as having a pH 3 ±0.2 it followed that not every batch of the material would infringe. Olaplex did not agree.

It was said to be common ground that the lower limit of the pH range in this claim was “exactly 3”, by which I understood the parties to mean 3 with as many zeros after the decimal point as you like. Therefore it was common ground that a material with a pH which is 2.9 and not 3.0 would not infringe. So L’Oréal submitted that since the product description allowed for material with a pH 3 ±0.2, it encompassed material with a pH

I am not satisfied that this case is one in which the material alleged to infringe varies as it is made such that sometimes it has a pH outside the claimed range and sometimes it falls within the claimed range. The level of precision of the ingredients in the Smartbond formulation stated in the product description varies. It is not giving anything secret away to set out the figures after the decimal points for the wt% for the six ingredients:

The pH of a mixture is just the result of the aggregate effect of the various ingredients in the concentrations they have. The precision stated for the ingredients indicates that the formulation is made to quite a high precision. Mr Legrand confirmed in his crossexamination if you make up the formulation of Smartbond, it is always going have a pH of 3. The reason for the stated range of ±0.2 is not due to a variation in the pH of the underlying material, it is to deal with possible variations in the calibration of the measuring equipment. I find that the pH of the Smartbond material which is made by L’Oréal has a pH of 3. The material infringes. There is no issue of variation which might need to be addressed at an inquiry.

Accordingly L’Oréal infringes all relevant claims.

The only live issue of priority was one which would only arise if I refused to allow the unconditional amendment. I will address it in case the matter goes further. The question is whether “simple salt” is entitled to priority. The priority document discloses a much wider range of active agents than are claimed in the granted claims. Included within the disclosure of the priority document (e.g. at p12 ln14-15) is a reference to especially preferred compounds being maleic acid and salts thereof. See also claims 7, 21 and 27. Nowhere is the word salt qualified by the word simple. If it was necessary to do so I would reject the claim to priority. I accept part of Olaplex’s case that it is not necessarily the case that the word simple has to be found expressly in the priority document. And I would find that the common general knowledge of the skilled person would include the idea that salts can be classified into different types. Having held that simple salt distinguishes from other salts in one of the ways described by Dr Hefford, it seems to me that for simple salt to be able to claim priority the priority document would have to contain at least some teaching somewhere that it might be relevant to think about that distinction (whichever one it was) between types of salt. That is absent. So there is no basis for a distinction between kinds of salt and no priority.

Normally I would address validity by legal category – novelty then obviousness. In this case it is more convenient to approach the issues by taking each item of cited prior art and working through the case arising from it.

There is no doubt that substantial quantities of Olaplex Bond Multiplier were distributed to colorists in the USA before the 16^th May 2014 priority date. Nor is there any dispute that if a person had such a sample and analysed it they would find it contained an appreciable amount of the diamine maleate salt. As a matter of fact the information they would acquire would, if the person was free to obtain and use it, make the invention available to that person. All the claims including all proposed amendments and all allegedly independently valid claims stand or fall together over this alleged prior use. The issue is to decide on the terms on which the samples were distributed.

The law is clear and not in dispute. As Lord Hoffmann explained in the House of Lords in Merrell Dow v Norton [1996] RPC 76, the use of a product makes the invention part of the state of the art only so far as that use makes available the necessary information. Pall Corp v Commercial Hydraulics [1990] FSR 329 demonstrates that whether giving someone a sample of product makes its contents available to the public or not depends on the terms on which the sample was provided. In Pall Corp experimental samples were given to potential customers for testing. Two instances of use were relied on. The first instance was supply of six samples of the microporous 6.6 nylon membrane to Motorola which were then used in public tests in the presence of trade rivals. Falconer J held that the samples to Motorola were experimental and secret and that the testing did not reveal any information about the nature of the product. Accordingly although

Olaplex submitted that in the case of a product whose chemical composition is not identified and could only have been identified by a process of chemical analysis it would have to be shown that the recipient of the product was free as a matter of law and equity both to send the composition away for analysis and then subsequently to make use of the information for his or her own purposes including the public disclosure of that information. I accept that submission.

Olaplex also submitted, correctly, that English law recognises an equitable obligation of confidence in appropriate circumstances, citing Coco v Clark [1969] RPC 41 and the Spycatcher case (A-G v Guardian Newspapers (No 2) [1990] 1 AC 109, 281 (per Lord Goff):

“I start with the broad general principle (which I do not intend in any way to be definitive) that a duty of confidence arises when confidential information comes to the knowledge of a person… in circumstances where he has notice, or is held to have agreed, that the information is confidential, with the effect that it would be just in all the circumstances that he should be precluded from disclosing the information to others.”

The main witness for Olaplex was Dean Christal. He has experience in the hair care industry. He explained that the product was developed by the inventors Dr Hawker and Dr Pressly. They did some work in a garage in Santa Barbara. Olaplex was a tiny company. In early 2013 Mr Christal was given some product to test and he did so by perming some swatches of hair. He liked the results. Mr Christal identified a person called Joe Santy. Joe Santy was a well known hair stylist referred to as the King of Perms. Neither Mr Christal nor the inventors knew him personally. They asked him to sign a non-disclosure agreement (NDA) which he did on 17^th July 2013. After that for a few months Mr Santy tried out the prototype which had been developed. At that time Mr Santy was not told the identity of the ingredients in the liquid being tested. Mr Christal did not know either. At some stage (late 2013 or early 2014) Mr Christal wanted to work with colorists and others in the industry to test and further develop the product.

The first patent application was filed on 1^st August 2013. A number of further patent applications followed. Mr Christal’s evidence was that his only involvement with patent applications was in paying for them.

Mr Christal met the first colorist who was going to test the product in February 2014. Her name was Tracey Cunningham. Ms Cunningham is and was a co-owner of the Mèche salon in Los Angeles. She was and remains a famous colorist with many celebrity clients. When Mr Christal was introduced to Ms Cunningham she was coloring the hair of a famous actress. Mr Christal says in his witness statement that he gave samples to Ms Cunningham to test, telling her that they contained a new secret

Since then a number of other colorists became testers too. Mr Christal’s evidence is that this was on the same essential terms, i.e. that the samples they were given were experimental samples for testing only and not to be distributed further. Mr Christal said that he did not want to give colorists NDAs to sign because in his experience that was not how they worked. Mr Christal said that his approach was to explain the confidential terms to the colorists personally. That way they could clear up anything they were not sure about. If they were not prepared to agree to his terms he would not have given them the product.

It is clear that the testing was on a reasonably large scale. Somewhere in the region of 20 colorists received samples before the priority date. Ms Cunningham clearly used a lot of material herself. There was a significant social media buzz about the Olaplex product, encouraged by Mr Christal. There are numerous references on Instagram before the priority date to famous women who had had Olaplex used on their hair. So this is a case, like Pall Corp, in which the public did know that a product of some kind was being tested.

The bottles of the product used did not carry a list of ingredients nor did they carry any words to indicate that they contained a secret formula or that they must not be distributed.

Both Mr Christal and the other witnesses concerned with the prior use, and also Dr

In closing L’Oréal confined its case to three disclosures: (i) to Tracey Cunningham herself, (ii) to Guy Tang, another colorist unconnected with Ms Cunningham, and (iii) to Esther Vasquez and Sylvie Vaught, who worked at a salon called Estilo. This was a realistic approach because if L’Oréal’s case does not succeed on those instances, it is not going to succeed on the others. Since the issues overlap I will summarise the three of the instances relied on and the points they raise before deciding the issues.

The involvement of Ms Cunningham has been described already. L’Oréal’s case is that the restrictions said to have been put on Tracey Cunningham’s use of Olaplex are demonstrably false - she considered herself free to take Olaplex to Dubai, she provided samples to other hair colourists in New York at the Met Ball and invited a colorist called Vicki Laris to use product in the Mèche Salon. She used 100s of bottles of Olaplex and posted widely on social media. L’Oréal contends that for reasons not properly explained she has not given evidence to the court notwithstanding she owns 4% of Olaplex. L’Oréal submits there is no evidence to support the suggestion that she was unable to do as she pleased with the samples and so, overall, the disclosure to Ms Cunningham should be held to be free of restriction and invalidating.

Guy Tang is a colorist who approached Mr Christal directly asking to use Olaplex. He was unknown to Mr Christal. Mr Tang had heard about Olaplex from social media posts by Ms Cunningham. Mr Tang had an internet celebrity client and he wanted to use the product on her. The first contact between Mr Tang and Mr Christal was by email. Mr Tang was clearly enthusiastic. His emails emphasise his social media following. Mr Christal’s testimony was that he spoke to Mr Tang on the telephone and then met him in Los Angeles. Mr Christal gave the samples to him at the meeting and at that meeting Mr Christal explained what the parameters were about being a tester, that it was a secret formula and that he had to keep it confidential and could not share it.

L’Oréal contended that Mr Tang was unknown to Dean Christal. Mr Christal was particularly interested in using Mr Tang because he was treating the particular internet celebrity and Mr Christal made particular efforts to get Olaplex to him before her treatment. Mr Christal was plainly interested in Mr Tang because of his enthusiasm and his huge following on social media. In his written evidence he said he was “initially reluctant” to use Mr Tang but L’Oréal submit this is not apparent in the email chain. L’Oréal submitted that the witness statement implied that an explanation as to confidentiality took place at Mr Tang’s salon (Salon Republic) but that in crossexamination when it was pointed out that Mr Christal’s email said he would only need 10 minutes with Mr Tang at the salon, Mr Christal suggested that he had a long conversation on the telephone. L’Oréal submitted that the court should hold that on the balance of probabilities the disclosure to Mr Tang was not under conditions of confidence and Mr Tang was not prevented from using the sample he had been provided with as he pleased.

Finally L’Oréal relies on Esther Vasquez and Sylvie Vaught. Ms Vasquez had a telephone conversation with L’Oréal’s solicitor Rachel Boakes. She said to Ms Boakes that she did not remember Mr Christal talking about confidentiality or any restrictions on use. Ms Vasquez then filed a statement stating that “Dean made it clear that the product was for our use only and it could not be shared with other or given to third parties”. She did not make herself available for cross-examination. L’Oréal contends that it is notable that Mz Vasquez does not mention the phone conversation with Rachel Boakes and seek to explain the change of recollection; nor does she say that Ms Boakes misunderstood her or that on reflection she realised she was wrong.

Sylvie Vaught worked at the Estilo salon. Ms Vasquez was her assistant in 2014. Ms Vaught knew Tracey Cunningham and respected her as a colorist. She would be interested in trying out anything Ms Cunningham was using. Ms Boakes’s notes of the conversation with Ms Vasquez were put to Ms Vaught in cross-examination. She said she did not remember it in the way described in the note. L’Oréal submitted that Ms Vaught said she could not clearly remember a conversation about confidentiality. She did indeed say that but she also said that it struck her that the confidentiality was a given, because she was testing a product. She said she absolutely knew that there were aspects of the product that were confidential, because she and Ms Vasquez were testing a product.

I turn to decide the issues. It is clear that Tracey Cunningham did take the Olaplex samples to Dubai and used them there. L’Oréal say this shows that Mr Christal’s evidence about the restrictions on Ms Cunningham was demonstrably false because one of the restrictions was that she was not supposed to use the samples outside her salon save for celebrity house calls. In cross-examination Mr Christal sought to equate the activity in Dubai with a form of celebrity house call. That was unconvincing. I find that Ms Cunningham did use the samples of the Olaplex material in at least one salon in Dubai. She clearly felt free to use it in that salon. I very much doubt it was used solely on celebrities as some kind of attempt to fit this activity into a “celebrity house call” exception.

This indicates that Mr Christal’s evidence is not entirely accurate. However he maintained, in the face of sustained questioning, that he did make it clear to Tracey Cunningham (and all the other testers to whom he gave product) that the product was a secret formula for testing and that they must only use the sample for testing and not distribute it to anyone else. I will refer to these core restrictions as the “general restrictions”. The question is whether Mr Christal’s demonstrably inaccurate testimony about the exact scope of the restrictions applicable to Ms Cunningham shows that the main thrust of his evidence, which is about the general restrictions, should not be accepted.

The other bases on which L’Oréal submit that Mr Christal’s evidence was demonstrably false are less clear cut. Tracey Cunningham clearly took samples of Olaplex to New York on the occasion of a glamourous event called the Met Ball. Ms Lim, one of Ms

This is a puzzling episode and I was doubtful about the attempts to minimise the significance of the samples made to be taken to New York. As best one can tell the preparation of the samples with instruction sheets inside and the likely quantity (I am not convinced the relevant emails were just talking about two bags) looks more consistent with samples being prepared to be handed out to a variety of people rather than just making a lot of bags to give to Harry Josh. But in the end there is just no reliable evidence that that is what actually happened. I find that the only person to whom Tracey Cunningham gave samples on that trip was Harry Josh. That means Mr Christal’s evidence on this was not wrong.

The final issue relating to acts carried out by Tracey Cunningham relied on to show that Mr Christal’s testimony about her was wrong, is L’Oréal’s submission that she invited Vicki Laris to use product at the Mèche Salon. The point is that, based on Mr Christal’s evidence, Ms Cunningham was not supposed to be handing out samples for others to use (even if she did make clear they were confidential).

Vicki Laris is a professional hair colourist in Chicago. She gave evidence at the trial. In cross-examination she explained that she could remember talking to Mr Christal on the telephone but could not remember when that call took place. She could remember that he asked her not to give Olaplex product to anyone else, and that she was the only one to use it. She also remembered that Mr Christal was going to be sending her Olaplex product samples so that she could test the product, and that he wanted her feedback sent back to him.

However the point against the claimants is that even assuming this is true, it must have happened after Vicki Laris had already encountered Olaplex at the Méche salon. It is clear that Ms Laris did use some Olaplex material whilst she was working at the Méche salon. Mr Christal’s suggestion about this in cross-examination (which Ms Laris did not hear) was that she could very well have been assisting Ms Cunningham, and that he would assume and know that Ms Cunningham would have explained the confidentiality to Ms Laris as part of that exercise.

Vicki Laris’s evidence in cross-examination was that she went out and worked with Tracey Cunningham at the Méche salon quite often. She could not remember why she was there in March 2014; she may have been working. When at Méche she assisted Ms Cunningham and also dealt with clients at the salon. Ms Laris said that Ms Cunningham gave her some Olaplex and told her that it was being tested for the prevention of breaking the hair during the chemical process. She wanted Ms Laris to try it; Ms Laris ended up trying it on herself.

So in her cross-examination Vicki Laris did say that when Tracey Cunningham gave her some Olaplex to try she was told it was for testing but Ms Laris did not say that Ms Cunningham said anything to her about confidentiality.

Whether Tracey Cunningham did tell Vicki Laris that the material was confidential (or words to that effect) or not, this episode does show that Mr Christal’s evidence about the restrictions placed on Ms Cunningham is either inaccurate or else, even if such restrictions were put to Ms Cunningham in the precise terms Mr Christal described in his written evidence, they were not in fact adhered to (and if that is true I am sure Mr Christal knew that since he spoke to Vicki Laris on the phone afterwards). So at best this demonstrates again that the evidence given in Mr Christal’s written statements is inaccurate. Either that or positively misleading.

Given the manner in which L’Oréal put their case, the relevance of the issues relating to Vicki Laris is about impugning Mr Christal’s evidence. I do not believe it is strictly necessary to go further and decide the basis on which Tracey Cunningham gave the product to Vicki Laris. However in case it is relevant, I will say this. Having heard Vicki Laris give evidence, in my judgment that question stands or falls with the question of the terms on which the samples were given to Ms Cunningham in the first place. If Ms Cunningham was given the samples subject to the general restrictions (defined above) then I would not find that Ms Cunningham failed to comply with those restrictions when she gave product to Vicki Laris. If Ms Cunningham had been told the product was subject to the general restrictions then it is more likely than not that she told the same thing to Vicki Laris when she gave the product to Ms Laris to test.

I did not get much assistance from the evidence of Jordan Alexander. L’Oréal submitted it showed that Tracey Cunningham was distributing samples free of any restrictions to colorists at Mèche before the priority date for them to use. Mr Alexander had been confused about dates but he was wrong to say that the product was only used at Mèche by Tracey Cunningham or her assistants. Others clearly did use it. But I cannot infer from this that those others were not given the product subject to the general restrictions.

The next major issue about Tracey Cunningham is her reasons for not attending trial. Ms Cunningham gave a very short witness statement from which, Olaplex submits, the obvious inference is that the reason she does not wish to give evidence is because she has significant commercial relationships with both parties. She is a 4% shareholder in Olaplex and a Redken product ambassador (Redken is a major L’Oréal product). L’Oréal submits that this inference is not what the witness statement actually says and the inference does not follow. L’Oréal contends that the true reason Tracey Cunningham has not given evidence is because her truthful evidence would be very bad for Olaplex’s case and she has a valuable shareholding. I am not prepared to draw that inference. If L’Oréal thought her evidence could assist them they could have approached her or even used the evidence gathering techniques available in the USA to obtain evidence for use in foreign proceedings. I do not draw any inference about the evidence Ms Cunningham would have given. I do infer that she did not wish to give evidence because she has a relationship she values with both sides.

Accordingly in conclusion on Tracey Cunningham, the key evidence that she was given samples subject to general restrictions and therefore was not free in law and equity to distribute them or analyse them herself is the testimony of Mr Christal. I will address that at the end.

The next issue is Guy Tang. There is a point of contrast between Mr Tang and Joe Santy – since both were unknown to Mr Christal or the inventors but only Mr Santy was required to fill in an NDA. But Mr Christal’s answer is that he wished to and did speak to Mr Tang personally. There is also a point that time was short and a point on the tone of the email exchange. But in the end the issue is the same as for Tracey Cunningham. Like Ms Cunningham, Mr Tang was provided with samples. The evidence from which the claimants invite the court to find that Mr Tang was subject to general restrictions is the testimony of Mr Christal. That depends on his credibility.

Finally the Estilo salon. That is a different matter. Based on Ms Vaught’s evidence in cross-examination I reject this aspect of L’Oréal’s case. I find that Ms Vaught and Ms Vasquez were only provided with samples of Olaplex product under the conditions I have called the general restrictions. I do not need to consider this point further.

So of the three episodes, for the two I have not yet decided (Cunningham and Tang) looking at the evidence as a whole, the issue turns on the reliability of Mr Christal’s evidence.

The other points taken about Mr Christal’s evidence were the following. It was said that he failed to explain why there were no confidentiality agreements in writing. He did not fail to explain that. He explained that he wished to work face to face. That is not inherently improbable. L’Oréal also suggested that his evidence that he thought colorists would not sign NDAs was falsified by the fact that colorists sign NDAs to work with celebrities. I reject that point. As Mr Christal explained the relative power in the relationship is different and the fact colorists sign NDAs so that they can work with celebrities does not undermine Mr Christal’s evidence that he thought they would not be prepared to sign an NDA with a start up company they had never heard of. There was a disagreement between Dr Pressly and Mr Christal about Mr Christal’s planned approach of not requiring NDAs from the colorist testers. Mr Christal was not frank about that. Also L’Oréal contends that Mr Christal received emails from people he did not know who appeared to have used Olaplex which must have appeared to him at the time as breaches of the general restrictions. He did not react to them in what L’Oréal says is the way you would have if that is what you thought. Mr Christal explained this however. He said he wished to maintain good relations with people and speak to them. I have dealt with the other matters concerning Mr Christal’s evidence in context.

Standing back, this issue turns not simply on Mr Christal’s general credibility but on his truthfulness. I put it that way because given what Mr Christal said, the idea that he could have given the extensive testimony he gave about what happened but had somehow misremembered what occurred is fanciful. So also is it fanciful to suppose that Mr Christal could have mistakenly convinced himself that all that took place happened in the manner he said when it did not. This is not a case in which the witness could be right about some occasions but wrong about others. I reject the idea that, for example, Mr Christal could have gone to the trouble of imposing a duty of confidence by speaking to Ms Cunningham but misremembered doing so for other testers. Given his testimony that makes no sense. Mr Christal’s evidence, if true, is sufficient to make the claimant’s case. Either Mr Christal is lying and the discussions he described are pure invention, or he is telling the truth.

In my judgment Mr Christal was not lying. I will not go back over all the detail. The points raised against Mr Christal’s evidence, particularly concerning Ms Cunningham, do show that his written evidence is inaccurate but I do not believe they show he gave untruthful evidence. Those are the errors made by someone seeking to tell the truth as they saw it and making mistakes of recollection coupled with a view about what “must have” happened. Standing back, I find that Mr Christal has told the truth. He did impose the general restrictions on Tracey Cunningham and on Guy Tang (and a number of others). Therefore the Olaplex samples, although they were tested in the presence of members of the public, were always subject to material restrictions on their use. They did not make any relevant information available to the public. I reject the validity attack based on prior use.

An entry for the Catzy product was published in the Mintel Global New Products database in about July 2007. Although at one stage L’Oréal also relied on the availability of the product itself, by the trial only the publication was relied on. The published information shows a photograph of the packaging with the title “Catzy Blonde” and indicates that it is a product of the company Midelfart & Co (which apparently is or was a Norwegian hair products company). The product description is:

“Catzy Hair Colourant is especially developed for Scandinavian women. The range is comprised of 14 shades and incorporates UV-filtration and provitamin B5.”

The product is a hair lightener including three formulations: a bleaching power which includes persulfate, a mixing cream which includes hydrogen peroxide; and an after treatment. There is no dye or dye precursor.

The ingredients are stated as follows:

“Bleaching powder: Sodium Silicate, Potassium Persulfate, CI 77713, Ammonium Persulfate, Paraffinum Liquidum (Liquid), Silica, Cellulose Gum, Urea, Carbomer, EDTA, Sodium Lauryl Sulfate, CI 77007

Mixing cream: Aqua, Hydrogen Peroxide, Cetearyl Alcohol, Olea Europaea Fruit, Lanolin, parfum, Benzyl Salicylate, Hexyl Cinnamal, Hydroxycitronellal, L-limonene, Alpha-isomethyl Ionone, Glyceryl Stearate, Sodium Stannate, Tartaric Acid, Maleic Acid, Sodium Lauryl Sulfate, Sodium Cetearyl Sulfate, Sodium Hydroxide

After treatment: Aqua, Cetyl Alcohol, Stearyl Alcohol, Distearoylethyl Hydroxyethylmonium Methosulfate, Caprylic/Capric Triglyceride, Helianthus Annuus Extract, Panthenol, Wheat Amino Acids, Triticum Vulgare Germ Oil, Sorbitol, Cetyl Palmitate, Cetearyl Alcohol, Cetrimonium Chloride, Isopropyl Alcohol, Ethylhexyl Methoxycinnamate, parfum, Butylene Glycol, Phenoxyethanol, Propylparaben, Methylparaben, Potassium Sorbate, Disodium EDTA, Sodium Chloride, BHT, Benzyl Salicylate, Hexyl Cinnamal, Llimonene, Alpha-isomethyl Ionone (Alpha)”

The point is that one of the ingredients in the mixing cream along with hydrogen peroxide is maleic acid (fourth from the end).

The amount of maleic acid in Catzy is not stated. To address this Olaplex produced a letter from a Swedish company called Hardford AB under a Civil Evidence Act notice. The letter is undated but was obviously produced for the purpose of this action. The letter explains that Hardford manufactured the product for Midelfart & Co A/S although they did not develop it. In the mixing cream the maleic acid content is 0.094 wt%. The evidence is that on that basis the wt% in the mixture applied to the hair would therefore be 0.071%.

Catzy is only relevant to the method claims of the Olaplex patent. L’Oréal rightly does not press an allegation of invalidity against use claims 11 or 12. They are novel over Catzy on conventional grounds. There is no suggestion that the use of maleic acid in order to reduce or prevent hair damage is obvious over Catzy.

However Catzy is pressed as rendering the method claims lacking novelty or lacking inventive step. Turning to claim 1, it makes no difference whether one is considering

Olaplex contended that since it is manifest the maleic acid in Catzy is an excipient, the mixing cream is not a second formulation within claim 1 because the maleic acid in Catzy is not an “active agent”. Olaplex pointed out that the patent specification expressly distinguishes between active agents and excipients. I agree that the specification does list excipients separately from the active agents but I do not agree this justifies excluding from a claim a formulation containing what the patent calls an active agent (maleic acid) just because the skilled person would assume the original formulator added it as an excipient, no doubt being unaware of its properties as a molecule which the patent has disclosed.

Without knowledge of the patent the skilled person looking at Catzy would say that the maleic acid in the formulation was an excipient. That does not mean they would think it did not perform any function at all. As a matter of common general knowledge excipients are by no means necessarily just inert substances. For example the first class of excipients described by the patent after the heading excipients on page 13 is surfactants at p14. That reflects the common general knowledge. The skilled person would identify maleic acid in the Catzy formulation as being present to perform a function – either pH adjuster/modifier or as a chelating agent. It would not be seen as inactive.

To construe “active agent” in a manner which excludes maleic acid in a hair lightening formulation involves either turning claim 1 into some kind of subjective, purpose limited claim or reading in a functional limitation along the lines of “in a sufficient amount to do the job”. The former construction is just not what the words say and since the patent includes use claims anyway there is no reason the reader would contemplate that such an ordinary method claim should be understood that way. The latter construction is also unwarranted. There is nothing in the patent to justify that interpretation. In argument Olaplex characterised the amount of maleic acid in Catzy as “tiny”. However the ranges actually stated expressly in the patent include “typical” amounts with a lower limit of 0.01wt% page 11.

Accordingly I find that the publication describing Catzy, which was made available to the public before the priority date, deprives claim 1 of novelty. That applies to the granted form of claim 1 and the unconditionally amended form.

Claim 3 was said to be independently valid although I did not have my attention drawn to any circumstance in which it could survive if claim 1 was anticipated. It might have

Claim 4 is relied on as being independently valid on the basis that it has a lower limit of 0.1 wt% for the maleic acid content. That limit relates to the wt% in the mixture of the two formulations and so the Catzy product as described in the Hardford letter is outside claim 4 because the maleic acid in the mixture would be 0.071%. In any event, irrespective of the Hardford letter the question is one of obviousness over the Mintel published information rather than novelty since the particular amount of maleic acid in Catzy is not made available to the public by the publication in the database.

Based on Dr Hefford’s evidence, I find it would be entirely obvious for a skilled person, given the information on the Mintel database, to set about making a product based on it. Copying such a product to make a “me too” formulation for the same market was not inventive. This is not a reverse engineering exercise since the skilled person has an ingredient list which does not specify amounts and does not have the product itself to analyse. Dr Hefford described the exercise which would be carried out. The formulator would use their skill to come up with a list of levels for the various ingredients to try first. It would be educated guesswork.

The skilled person would be able to identify the likely functions of the various ingredients. Maleic acid was a known ingredient and the skilled person would identify its function as pH control and/or chelating metal ions.

Pausing at this stage, in my judgment no inventive step would be involved for the skilled person given the published information about Catzy to produce a hair lightening formulation based on the ingredients list which included some maleic acid. They would make up a product using their skill to specify the amounts for the various components. It would then be tested and the amounts adjusted as necessary. I find that after adjustment the product would work satisfactorily and would include a maleic acid component. All of this would be routine work for the formulator member of the skilled team.

The issue turns on the level of the maleic acid component in the product produced this way. The skilled person would assume that the ingredients in the list were listed in order of amount down to 1%, while the ingredients below 1% could be in any order. The skilled person would know that neither assumption was necessarily correct but it would be the natural and obvious way to look at the information. In the mixing cream ingredient list the skilled person would take it that “parfum” was not above 1%. Therefore (and in any event) the skilled person would expect that the maleic acid component was in an amount less than 1%.

Dr Hefford’s view expressed before he saw the Hardford letter was that when the skilled person formulated a product they would end up with about 0.3% to 0.5% maleic acid. He also said he would be extremely surprised if the amount of maleic acid did not lie between 0.1% and 1% in Catzy.

Olaplex submitted that this approach by Dr Hefford was a “pretty bizarre approach” and that it was unclear why Dr Hefford considered that this process (which Olaplex called speculative) would end up with the 0.3% to 0.5% range since he had never actually tried to do the process with the formulation of Catzy. Olaplex submitted that a more sensible approach was to start from the proposition that maleic acid was there for a particular purpose and that you would simply add enough to do the job. Dr Hefford agreed that you would need just enough to do the job. The fallacy in Olaplex’s submission here is the idea that adding enough to do the job is different from Dr Hefford’s view that the end result would be likely to be 0.3% to 0.5%. Dr Hefford’s position was that the skilled person would indeed aim to add enough to do the job in the circumstances they found themselves. The job of maleic acid would be to control pH or as a chelating agent. His view, given his experience in formulation, was that the result was likely to be a concentration in that range. I reject the submission that this was pretty bizarre or speculative. It was solidly based in his experience.

But Dr Hefford’s opinion based on his experience is not the only evidence of what the amount of maleic acid might end up being. There is also the Hardford letter. It was put to Dr Hefford that this represented the best evidence of what is needed for maleic acid to perform its function. The formulators will have added enough to do the job and we know how much they used. Dr Hefford did not agree that this was the best evidence. Olaplex submitted it was not clear why he did not agree but in fact Dr Hefford explained his reasons clearly in cross-examination. He explained that he would look at the sodium stannate, the tartaric acid and the maleic acid as a stabilising system to prevent the hydrogen peroxide product “going off”. The stability of hydrogen peroxide relates to pH and to metal ions. The amount of stabiliser depends on the grade of hydrogen peroxide the manufacturer has actually used in the formulation. For example cheap hydrogen peroxide might require a lot of stabiliser. The amount of stabiliser also depends on the manufacturing tank, filling line and packaging because if those produce a high level of metal ions, then a high level of metal chelating agent is needed to take the metal ions out. The skilled person would pass the product through their manufacturing plant and see how stable it was. If at 0.04% maleic acid, it was stable then the skilled person would be happy with that. Dr Hefford maintained that he was surprised the level of chelating agent (by which he meant maleic acid) was as low as is stated in the Hardford letter but noted that they were obviously happy with it. However his view was that using Hardford’s level for that particular ingredient was not relevant to things made in other manufacturing facilities.

Dr Hefford’s point was not that he did not believe the number in the Hardford letter (in his second report he had described it as “on the low side”). His point was, as explained above, that it did not demonstrate what level the skilled person would produce in practice.

It was also suggested that Dr Hefford was embarrassed by the Hardford letter given his opinion expressed in his first report. I do not believe Dr Hefford was embarrassed at all. His evidence explaining how the skilled person would proceed given the published information was a convincing and credible explanation of routine work by the skilled person. I accept it.

Olaplex submitted that the obvious thing to do given the Mintel database was ask the actual manufacturers, and that if that was done the information in the Hardford letter would be produced. I reject this for the following reasons. First, although Prof Haddleton expressed the view that there was no motivation to change the amount of maleic acid in the Catzy product given that it was on the market, in fact as Dr Hefford’s explanation shows, knowing precisely how much maleic acid is in the Catzy product does not tell the skilled person how much they will need in a product made in their own factory. So it is not a critical item of information.

Second I am not satisfied that even if they asked, the skilled person would have received the information in any event. Clearly sometimes manufacturers will divulge this sort of information, but sometimes they will not. Prof Haddleton had experience of asking for it and being given it. But both sides in this case jealously guarded the quantities of the ingredients in their formulations and the trial was conducted on that basis. The evidence does not establish how the Hardford letter came to be produced. The correspondence, presumably starting with an approach to Midelfart, has not been produced. Therefore the simple fact that Hardford was prepared to divulge the level of maleic acid today, without knowing how they were approached or by whom, is not a sound basis from which to infer that they would have done so then when approached by a person skilled in the art.

It is certainly not inevitable that a skilled person given the published information about Catzy would end up with a product within claim 4, or strictly a product whereby its use as a hair lightener would be a method within claim 4. So claim 4 is novel. However in my judgment claim 4 does not involve an inventive step. It would be obvious to produce a product in which there was more than 0.1 wt% maleic acid in the mixture. The product produced without any inventive step would have a level of 0.3 wt% to 0.5 wt%.

Putting it another way, a formulation producing a mixture with a level of between 0.3 wt% to 0.5 wt% maleic acid is not an inventive solution to any technical problem given Catzy. It arises from the uninventive application by the skilled person of their common general knowledge of maleic acid as a pH adjuster and metal chelating agent in order to help stabilise hydrogen peroxide.

Therefore Claim 4 is invalid.

No other granted or unconditionally amended method claims are alleged to be independently valid. That leaves so called Fall-Back 2 which proposes amendments to claim 1 to include bleach power and developer and also a pH range. The real purpose of that amendment was as a fall back over Kim in case the construction of “providing bleached hair” would include the oxidation dye process, since developers are (normally) used in oxidation dye formulations. Fall-Back 2 in effect makes sure the claimed method is a hair lightening method rather than an oxidation dye method. I think strictly speaking the condition advanced by Olaplex in which Fall-Back 2 was advanced is not triggered by having decided all the method claims are invalid over Catzy but I will consider it briefly anyway. This sort of difficulty is an illustration of the problems caused by multiple conditional amendments. They need to be ranked in a clear way.

I find claim 1 of Fall-Back 2 is invalid over Catzy. Since Catzy is a hair lightening formulation with both peroxide and persulfate the only issue is pH. Prof Haddleton accepted (2^nd report paragraph 120) that it would have been obvious over Catzy to formulate the component containing the maleic acid in Catzy to a pH in the general range claimed in Fall-Back 2 claim 1 (pH 3 to pH 8).

Accordingly all the method claims 1-10 however they are amended are invalid over Catzy.

The WO 768 application describes its “Field of Invention” as methods and compositions for treating hair or skin, particularly for repairing disulphide bonds in hair or on the skin (p1 ln18). A wide range of “binding agents” are described. They include salts of maleic acid.

The important dates are set out below.

Thus for any claim of the Olaplex patent in suit which is not entitled to claim priority from the US filing on 15^th May 2014, WO 768 is full prior art. That is because the publication date of WO 768 is before the filing date of the patent in suit. But unconditionally amended claims 1 and 11 and the allegedly independently valid claims dependent on them are all entitled to claim priority from 15^th May 2014. Accordingly the only issue is novelty under s2(3) of the Act. Furthermore the only matter disclosed in WO 768 which is relevant to that novelty attack is matter which is itself entitled to a priority date earlier than 15^th May 2014. That is because the filing date of WO 768 itself is after the filing date of the patent in suit.

L’Oréal focussed on Example 8 of WO 786 (at p48) and contended it was entitled to priority from the fourth and fifth priority filings. If it is then all the claims of the patent in suit are invalid.

Example 8 describes a comparison test between two hair highlighting treatments. In one treatment a single highlighting formulation is applied to the hair. That formulation includes a developer and a bleach. It comprises a bleaching agent on any view and therefore is a first formulation within claim 1 of the Olaplex patent. In the other treatment the same highlighting formulation is applied together with another formulation called a binding formulation. The binding formulation comprises a

Dr Hefford’s evidence, which I accept, is that in the concentration described this will make up 15 wt% maleate ions and 9 wt% of the diamine and will likely be mostly present as hydrogen maleate and the diamine in its fully ionised form. When mixed with the highlighting formulation, the mixture will contain about 2 wt% maleate and 1.2 wt% diamine. In that formulation the maleic acid will be in the form of maleate ions in the presence of diamine and other cations and anions.

Accordingly the binding formulation in Example 8 is a second formulation within claim 1. The method of Example 8 is within claim 1 as granted and as unconditionally amended. The method is within claim 4. Example 8 also discloses the use claimed in claim 11 as granted and as unconditionally amended. Neither side addressed the point but in any event I find that the claims of Fall-Back 2 would lack novelty over Example 8 read in the context of the pH ranges discussed for the formulations in WO 768 and in the relevant priority documents.

Therefore if the matter disclosed in Example 8 is entitled to a priority earlier than 16^th May 2014 then the Olaplex patent in suit is entirely invalid.

For the priority argument L’Oréal focussed on the fifth priority document US 089 in opening. However in closing L’Oréal focussed on the fourth priority document US 239 which was filed on 12 November 2013. The circumstances which led to this change are addressed below. Example 4 of US 239 discloses the use of a “bismaleimide crosslinking agent” in a hair highlighting treatment. Example 4 of US 239 is in the same form as Example 8 of WO 768. It is a comparison between two hair highlighting treatments. There is a highlighting formulation which includes a developer and a bleach. On one treatment this formulation alone is applied to the hair. In the other treatment the highlighting formulation is mixed with a second formulation containing a maleic acid derivative in water. However unlike Example 8 of WO 768, in Example 4 of US 239, the maleic acid derivative is stated to be a maleimide. The structure of that maleimide is:

Although this is a maleic acid derivative (the two maleic acid moieties can be seen at either end of the molecule) it is common ground that this covalent molecule is not the same thing as the diamine salt referred to in Example 8. The molecule above is an imide rather than an amine (as in the salt above) or for that matter an amide. Essentially the difference between an amide and an imide is that an amide has a single carbonyl group bound to the nitrogen whereas in an imide there is a pair of carbonyl groups bound to the nitrogen. The molecule above has two imide groups.

The synthesis of the bismaleimide agent is set out in Example 1 of US 239. The synthesis is depicted in the document in this way:

The scheme starts with maleic anhydride and the diamine shown. That diamine is the same diamine as is in the salt described in Example 8 of WO 768 and in the prior used Olaplex samples. The reaction is carried out in dichloromethane and produces the molecule shown above known as the diacid. It is a diacid because at each end there is

One might think that the fact that Example 4 of US 239 described a completely different chemical entity from Example 8 of WO 768 was fatal to any claim to priority. However in Dr Hefford’s expert report he expressed the view that the bismaleimide agent was sensitive to water and would undergo a hydrolysis reaction in aqueous solution to form the diacid. The diacid has two secondary amide linkages and Dr Hefford then expressed the view that although amide linkages cannot easily be hydrolysed in physiological conditions, by thinking about what happens to amide bonds in hair, his opinion was that it was feasible that the diacid would undergo at least some hydrolysis over time on storage or when mixed with an alkaline bleaching/colouring formulation, to form the maleate and the diamine species.

What Dr Hefford was talking about was a possible reaction along the lines set out below:

However, as Dr Hefford concluded, it was very hard to predict the rate or extent of that reaction.

Prof Haddleton agreed that the first step (maleimide to diacid) was possible if the maleimide was stored for a time in water but he was not sure about the rate and noted there was no teaching in the priority document to store it that way. In fact he looked at US 089 rather than US 239 but nothing turns on that. As for the second hydrolysis which is supposed to turn the diacid into the diamine salt, his view was that such a reaction would be expected to require heat. That is because it would need to break the amide linkages in the diacid. There was also a point on a description of the diacid in a scientific manual (Thermo) but following the cross-examination I am not satisfied that reference is relevant to this issue. In any event however in the cross-examination Prof Haddleton maintained that the amides (which are in the diacid) would require extreme conditions.

This was the argument advanced in L’Oréal’s opening skeleton. It was a thin basis on which to found an argument that Example 8 was entitled to priority from Example 4 of

However during the cross-examination of Prof Haddleton L’Oréal put a different point to the witness. This was based on a proton nuclear magnetic resonance (NMR) spectrum of the product made by Example 1 of US 239. The NMR spectrum was taken in dimethylsulfoxide (DMSO) as the solvent. Figure 1 of US 239 is the NMR spectrum. Prof Haddleton was cross-examined about it first by Dr Turner QC and then by Mr Chacksfield. Normally the court will not permit two counsel for the same party to cross-examine the same witness but as sometimes happens in patent cases a particular detailed scientific issue is handled by experienced junior counsel like Mr Chacksfield instead of leading counsel. In this case Mr Chacksfield was handling the Notice of Experiments which analyse the sample of the Olaplex prior use samples. So even though the main cross-examination of Prof Haddleton was undertaken by Dr Turner, he asked and I agreed that Mr Chacksfield could follow and cross-examine the professor on that topic.

Another part of the context is this. On 25^th April (i.e. the second day of trial and the day on which Prof Haddleton went into the witness box) L’Oréal had served a second expert’s report of Professor Law which included further analysis he had carried out on the NMR spectra produced by Juniper. Prof Law explained two things. One was that two additional components in the Olaplex product could be identified - benzoic acid and phenoxy ethanol. That accounted for what had previously been seen as an unidentified 5% of the material. The other was a point explaining how the peaks in the NMR correspond to the maleic acid diamine salt. One peak in particular was a broad peak at 7.4ppm which he said was caused by the labile proton from the amine groups on the diamine. Olaplex had indicated there was no objection to this evidence and was not seeking to cross-examine Prof Law.

Prof Haddleton was first cross-examined about the NMR spectrum at Figure 1 of US 239 by Dr Turner QC. He was asked about a broad peak which appears in it at about 7.9 ppm and it was suggested it shows a labile proton. He thought it might be from water but was not sure. He thought the spectrum was consistent with the maleimide and not with the diacid. He was not asked directly about the diamine salt. Then Mr Chacksfield cross-examined the professor about the Juniper report of the analyses of the Olaplex product and the benzoic acid and phenoxy ethanol components as making up the unidentified 5%.

After that Mr Chacksfield put to Prof Haddleton the Juniper NMR spectrum of the Olaplex product side by side with the NMR spectrum in figure 1 of US 239. Counsel drew the professor’s attention to the broad peak representing the labile protons in the amine at 7.4ppm in the Juniper NMR spectrum and put to him that the explanation for the broad peak at 7.9ppm in the spectrum at figure 1 of US 239 was the presence of such labile protons. In other words the point being put was that the spectrum in figure 1 was in fact a spectrum of the maleate diamine salt, the same material as in the Olaplex product, and was not a spectrum for the maleimide, even though US 239 says it was. The shift between 7.4 and 7.9 was said to be likely due to the difference in solvents.

Prof Haddleton made clear that he would have preferred to have had a chance to think about this and use the software tool he uses for NMR analysis but it was clear that ascribing peaks to NMR spectra is very much part of the professor’s work and experience. Prof Haddleton agreed that the broad peak was not from the maleimide. L’Oréal contends that in the end Prof Haddleton accepted that it was probably right that the spectrum was the maleic acid diamine salt.

Prof Haddleton was not re-examined on these points and the evidence closed.

In closing L’Oréal submitted that the court should be satisfied on the balance of probabilities that despite what the priority document says, in fact the salt was the true product of the reaction. L’Oréal also contended that if one tracks through the later priority filings it seems that the inventors appear to have realised that in fact the substance was the salt and not the imide. Hence it was submitted that priority for the salt in Example 8 of WO 768 was established because the product of the synthesis in Example 1 of US 239 is in fact the very same salt even though it is called the maleimide.

In closing Olaplex made two submissions. The first was that this was an entirely new case, a deliberate ambush and should not be entertained. The court should exercise the power in CPR Part 3 rule 3.1(2)(k) and exclude the issue from consideration. The second submission was that in any event the argument fails on the facts.

On the first submission Olaplex submitted that the new case was potentially of fundamental significance to the issue of priority and therefore of validity. It was a selfcontained technical issue. Olaplex had not been told when the point was thought of but it must have been in advance of the cross-examination. It was a point on which Olaplex could have considered obtaining and filing a range of evidence: such as investigating how the original synthesis and NMR were recorded, whether there was a point about a water (or strictly OH) peak, where the alleged labile proton peak would appear in the particular solvent being used or what other groups might have given rise to a peak at the point in issue. If the point had been raised by Prof Law in his second Report served on 25^th April then it would have given rise to serious objections, and could not have been run without an adjournment, which Olaplex contended was unlikely to have been allowed. The point must have been considered in detail by the Defendants in the course of preparing their cross-examination. This must have been before Prof Haddleton went into the witness box and before Prof Law provided his final Report which did not mention the point at all.

L’Oréal accepted that matters had developed during the trial which were not ventilated in the expert’s reports. Dr Turner explained that it was not a deliberate ambush because the significance of the NMR in Figure 1 only became apparent to the team during the course of the first week of trial. He submitted that priority from US 239 was a pleaded issue and that no objection was taken while the evidence was open. Had objection been taken before the evidence closed, the court would have been faced with various options, and would have heard argument. It cannot be assumed that such an objection, if it had been raised at that stage, would have been successful. The options for the court would have included hearing further evidence and/or further cross-examination. Also L’Oréal pointed out (i) that one of the inventors was in court for the whole trial (Mr Pressly) and so instructions could have been taken about the NMR; and (ii) that Olaplex had not hitherto addressed the fourth priority document and on such an application would have had to explain why not.

No authorities were cited on the extent of the court’s powers under CPR Part 3 rule 3.1(2)(k). Although no doubt the power in rule 3.1(2)(k) would normally be exercised before trial, there is nothing stated in the rule which limits the occasions on which it could be exercised and in my judgment it could be exercised at any time prior to judgment being given. The fact that no objection had been taken to the line of questioning in cross-examination or that the point was only raised after the evidence had closed are relevant matters to take into account but they do not preclude the exercise of the power in circumstances which would otherwise be a furtherance of the overriding objective.

Olaplex made submissions about the principles by which the Patents Court operates. I agree with them. Some are elementary but are worth restating anyway. I set them out here with minor modifications:

A further principle submitted by Olaplex was that the Patents Court procedure encourages counsel not to interrupt cross-examination to make objections as to lines of questioning. If there is a proper objection to a question then it ought to be taken, but I entirely agree that cross-examination should not be interrupted unless it is strictly necessary. That has the great advantage of avoiding a disruptive style of trial process. It is particularly advantageous when the questions involve highly technical subject matter whose significance can be quite unclear at the time. However a consequence of encouraging counsel not to interrupt cross-examination unless they really have to, is that the court must be prepared to exercise its power, in a proper case, to exclude an

I accept what I have been told on behalf of L’Oréal that the point only became apparent during the first week of trial. Nevertheless it obviously was not thought of during the time Prof Haddleton was under oath and therefore it could, and so should, have been raised with the other side before the professor was called as a witness. He was clearly the only relevant witness then being called by Olaplex to whom the point could be put. The fact it was not raised in advance is a relevant factor in the exercise of the power under r3.1(2)(k).

The point is a highly technical piece of science about the attribution of peaks in a proton NMR spectrum. That itself is another a reason why it ought to have been foreshadowed either in an expert’s report, a Statement of Case or at least in a solicitor’s letter. Moreover Olaplex is correct that there is a range of evidence which could be investigated to address the issue, not only about NMR itself but about the surrounding circumstances. To take one example: for all anyone knows Figure 1 is indeed a spectrum for the salt not the imide but the explanation is simply the spectra were muddled up at the time and the wrong one was filed and thus the figure does not tell you anything about what the experimental method of example 1 actually produces.

L’Oréal’s stance includes in effect a hint that Olaplex must have always known this was a problem. That is the implication of the point L’Oréal makes that if the matter had been raised Olaplex would have to have explained why it had not called evidence about US 239. But until the cross-examination of Prof Haddleton this new point had not been mentioned at all. There is no basis for an inference that before 26^th April Olaplex was aware of this problem (if that is what it is).

L’Oréal’s stance also in effect suggests that Olaplex must have worked with Mr Pressly between Thursday 26^th April and Monday 30^th April when the written closings were filed and found that L’Oréal is correct and there is nothing Olaplex can put forward to gainsay the submission. Again I draw no such inference. Given what would have to be investigated the time available is far too short.

The forensic purpose of these two aspects of L’Oréal’s stance is to support a criticism of Olaplex that the objection ought to have been taken on Thursday and it is too late to take it on paper on the Monday. I reject that criticism. Olaplex has not had a proper opportunity to investigate this matter.

This action is an important case between substantial commercial organisations in a high value market. Both sides have sophisticated legal teams well able to handle issues of this kind if they are raised at short notice. Even with that in mind however and even though the objection was taken in closing rather than during the cross-examination, in my judgment the issue of what is to be inferred from the NMR spectrum which forms figure 1 of US 239 should be excluded from consideration. To decide it now would not be to deal with this case justly and at proportionate cost.

Example 8 in WO 768 is not supported by US 239 and does not have priority from it. The Olaplex patent does not lack novelty over WO 768.

Since I had the benefit of hearing Prof Haddleton, in case the matter goes further, I will address the issue as best I can on the materials which are available in any event.

Prof Haddleton was put in some difficulty by the questioning about the peaks but it was a subject he was very familiar with and he was able to look after himself. Prof Haddleton did not think he had definitive proof and wanted more experimental work to be done. However listening carefully to him, the concession that he made that the broad peak in figure 1 was probably from labile protons in the maleate salt was not lightly made. If he could have thought of any other possible explanation he would have said so. Definitive proof is not the standard required by the law. If I had to decide the point on the material I have, I would find on the balance of probabilities that the sample analysed to produce Figure 1 of US 239 contained appreciable amounts of the maleate diamine salt.

Would that mean Example 8 of WO 768 is entitled to a priority derived from US 239? Not in the least. This sort of priority argument is a variant of the “rose by any other name” type of case (cf Synthon v SmithKline Beecham [2005] UKHL 59). To found priority it must be inevitable that the skilled person given US 239 would make the maleate salt even though the disclosure is telling the skilled person in terms to make the maleimide. The text identifies one molecule and the spectrum identifies another one. There is no obvious way to resolve the issue without repeating the experiment and seeing what happens. That has not been done. Moreover the fact that (if true) a maleate salt was produced on one occasion does not prove it is inevitable, all the more so when the skilled person will be aiming to make an imide not a salt. Maybe the synthesis actually undertaken by the inventors was not done strictly in accordance with what is written in Example 1, we do not know. Perhaps there was a muddle with the spectra and the wrong one was used as figure 1. Perhaps the further experiments required by Prof Haddleton for definitive proof would turn out to show that the broad peak is not from the salt at all but from something else.

All this goes to show that the argument to support a claim to priority for Example 8 of WO 768 from US 239 supported by conclusions drawn from the NMR spectrum at figure 1 is US 239 is too speculative. If I had to decide it I would reject it.

Kim is a Korean patent application entitled “Hair dye composition”. It was published in January 2003 and filed in July 2001. At trial an agreed English translation was used.

Kim is concerned with formulations of a hair dye including additives which are maleic acid derivatives. There is no description in Kim of a hair lightening formulation, by which I mean a formulation which bleaches the hair and changes the hair colour without use of a dye.

The abstract of Kim states:

“This invention relates to a novel hair dye composition, more specifically, to a hair dye composition which contains an oxidation dye precursor and further a maleic acid derivative, thus having a hair protective effect that is superior to conventional dyes.”

In a passage from p2 ln13-21 of the translation Kim refers to conventional hair dye compositions and refers to the fact that they include a first agent which contains dye precursors which typically form a dye on being oxidised and a second agent which includes hydrogen peroxide. The purpose of the compositions is to dye the hair as completely as possible, whilst achieving a long-lasting hair dyeing effect. Kim goes on to explain that the currently available hair dyes have the drawback that the hair is damaged and becomes rough or loses its lustre because in order to increase the dyeing effect on the hair the first agent has high alkalinity and the second agent uses hydrogen peroxide.

Kim then poses the “Problem the Invention is intended to Solve” and explains a discovery that the inventors have made through thorough research of oxidation hair dye compositions that can reduce hair damage after dyeing. The discovery is that hair damage after dyeing can be further reduced by using a maleic acid derivative in combination with a hair dye composition containing an oxidation hair dye precursor. A summary of the invention is then set out as being a:

“hair dye composition wherein the hair dye composition contains one or more oxidation dye precursors and further maleic acid, maleic acid anhydride, maleamic acid, maleimide, and metal salts thereof.”

The detailed description follows. It refers to commonly used oxidation dye precursors and also refers (at p3 ln22-24) to direct dyes. Olaplex place a lot of emphasis on this reference to direct dyes. The point is that such dyes do not need to be oxidised. They would not be formulated with hydrogen peroxide.

The next important section is a discussion of the mechanism by which the maleic acid derivatives protect the hair after dyeing. It is as follows:

“The thiol groups that are present in the hair bring about damage to the hair accompanied by a reduced tensile strength or breaking strength compared to the original hair through thiol-disulphide bond interchange reactions during a dyeing process. The thiol groups in the hair can undergo an addition reaction with a substance that has an ,-unsaturated carbonyl group, such as maleic acid. Thus, the addition reaction of the thiol groups with maleic acid can lower the possibility of a reaction among the thiols within the hair, resulting in reduction of hair damage.”

Although this mechanism involves the disulphide bridges in the hair, an important point in the context of this case is that this concept of thiol-disulphide interchange causing damage to the hair involves a process of reduction rather than oxidation. When reduction breaks a disulphide bridge the result is two thiols, in effect [-S-S-] is turned

There was a debate about what the skilled person would make of the mechanism in Kim. I will come back to that.

After some more detail, which suggests the inventors of Kim may have carried out a range of experiments on wt % of maleic acid derivatives the results of which are not set out, Kim then provides four examples of a hair dye composition in Table 1. Example 1 contains maleic acid, example 2 sodium maleate, example 3 maleamic acid, and example 4 maleimide.

Kim then reports the results of experiments using those example formulations to dye hair and measure the effect on the tensile strength of the hair. The hair is dyed five times. The results are set out in Table 2. The way the results work is that a control (with no maleic acid derivative) is run as Comparative Example 1. That has no maleic acid derivative. The effect of the dyeing treatment is to reduce the tensile strength of the hair by 19.4%. The results for the four examples can be compared with that. They all either produce a lesser reduction in tensile strength or in one case a small increase. The idea is that the greater the degree of reduction in breaking strength, the more severe the hair damage. The results are:

The figures are based on an average of the strength of 50 hairs. Nothing of substance turns on it but one of Prof Haddleton’s less convincing passages of testimony was his suggestion that this was done by taking one measurement of a clump of 50 hairs and dividing the result by 50. That is plainly not what Kim means by the statement that the values in the table are the average of those of 50 hairs. Measuring a single value for a 50 hair clump does not involve taking the average of the values (plural, my emphasis) of 50 hairs.

Kim explains that the lowered tensile strength indicates severe hair damage due to changes in the protein structure within the hair and concludes from the results in the table that the maleic acid derivatives give a markedly lower reduction in tensile strength than the control.

On the construction of “providing bleached hair” I have accepted, the claims are all novel over Kim. That is because Kim is a dyeing process.

The skilled person and the common general knowledge have been identified already. In terms of inventive concept whether I am considering claim 1 or claim 11 whether as granted or unconditionally amended, the inventive concept is the same. Focussing on claim 11 it is the use of maleic acid (which includes maleate and hydrogen maleate ions) simultaneously with a bleaching agent to reduce or prevent hair damage due to a treatment to provide bleached hair.

Comparing Kim to claim 11, the document does disclose the use of maleic acid (and maleate ions) to reduce or prevent hair damage due to a hair treatment. Identifying the differences between Kim and claim 11, the only difference is that Kim is concerned with a dyeing treatment whereas the claim is concerned with hair lightening by bleaching and without dye.

Another aspect to have in mind is that only three of the four maleic acid derivatives in Kim are within the claims of the Olaplex patent. Kim Example 4 is a maleimide. It is not the same maleimide as the one in WO 768 but in any case it is not within the claims.

The question in the end is whether it would be obvious to the skilled person to apply the idea disclosed in Kim of using an additive such as maleic acid to reduce or prevent hair damage due to a hair lightening treatment involving bleaching without dyeing.

Despite the elaboration given to this issue at trial, in my judgment this question turns on a short and simple point. The skilled person knows as part of their common general knowledge that a hair lightening treatment involving bleaching without dyeing is a highly oxidative environment. The mixtures used generally include hydrogen peroxide and persulfate. The damage caused by that sort of treatment was known to be damage caused by that oxidative environment. For the skilled person to think it was worth using any of the additives disclosed in Kim, they have to believe that those additives might have an effect in a system in which the damage the additive is there to deal with is caused by oxidation.

In my judgment it would not be obvious to the skilled person that the maleic acid derivatives in Kim might (let alone would) have a protective effect against damage caused by oxidation. That is for the following reasons. First and foremost the thioldisulphide mechanism actually proposed by Kim is concerned with reduction not oxidation. The skilled person would regard it as scientifically credible. Dr Hefford agreed that the mechanism would be viewed as credible although in cross-examination (but not in his report) he suggested that while it was credible as a phenomenon, it was not as an explanation for a reduction in tensile strength. I was not convinced by that qualification. As a matter of common general knowledge, both oxidation and reduction were known to damage disulphide bonds and were known to reduce the tensile strength of hair. Since reduction was known to cause damage, the idea that an additive might act to reduce that damage by interacting with thiol groups to prevent it is credible. There was then a point on the availability of thiol groups but I am not satisfied the skilled person’s thinking would go so far as to delve into the likely number and availability of thiol groups so as to lead to doubts about Kim’s mechanism. That degree of insight and thought is a hallmark of inventiveness (or hindsight).

Second the Kim document goes out of its way to propose a mechanism. It does not simply present data and leave the reader to infer how it is working. On the face of it the inventors of Kim have done the tests they say they have done and perhaps done more tests too.

Third, although oxidative dye compositions do use oxidising agents, they are known to have a much less aggressively oxidising effect than the hair lightening treatments which involved bleaching without dyeing. The latter had two aggressive oxidisers – hydrogen peroxide and persulfate. The former had hydrogen peroxide alone. Olaplex overstate the case sometimes when seeking to downplay the significance of the hydrogen peroxide in an oxidative dyeing composition. While its function was in part to oxidise the dye precursors, it is clear that the skilled person would, as a matter of common general knowledge, understand that the hydrogen peroxide would often act by bleaching the hair as well. That would not always happen to an appreciable extent but it often would. That effect of the hydrogen peroxide was understood to be the cause of hair damage with repeated use of oxidative dyeing treatments. However Kim does not say anything which purports to link the hydrogen peroxide in the oxidative dye formulations described with the damage mitigated by the maleic acid derivatives. That would be contrary to the mechanism Kim proposes.

Fourth, although Kim does make clear that the proposal relates to oxidative dyes and a system with oxidative dye precursors, it does also expressly contemplate a system with direct dyes and therefore no hydrogen peroxide at all. Albeit that no results are presented for direct dyes, that suggestion is inconsistent with the effect being one associated with oxidative damage.

For a skilled person to think that maleic acid would work to prevent damage in a pure bleaching system with no dye would involve that person thinking they knew better than Kim. It is not the law that the skilled person is bound to follow whatever mechanism is proposed in a prior teaching nor is it the law that it is necessarily inventive to go against or beyond such a teaching. It always depends on the facts of the particular case. I accept this is an empirical art and that the skilled person would be interested in the data in Kim (“the data is the data” as Prof Haddleton said). The skilled person would not reject the data, for example, just because the particular Diastron instrument on which the tensile tests were measured was not identified.

The problem for L’Oréal is that the skilled person is aware that chemical reduction can cause damage to hair and so there is no reason for an uninventive skilled person to disbelieve Kim. For a skilled person to go ahead and test maleic acid in a hair lightening formulation involving hydrogen peroxide, persulfate and no dye would be an act of invention. I reject the obviousness case over Kim.

I have not taken into account the unpleaded commercial success argument advanced by Olaplex, including the cross-examination materials referring to the Holy Grail and some parts of Mr Christal’s testimony. The evidence does suggest that maleic acid or derivatives of it do have some genuine effect to reduce hair damage cause by oxidation, but that just goes to show that the invention works and so there is no insufficiency.

A point which emerged in closing was about the second claimant’s status. The second claimant Olaplex, LLC claims to be an exclusive licensee under the patent and therefore claims to have a cause of action to sue for patent infringement by s67 of the 1977 Patents Act. L’Oréal did not admit that the company was an exclusive licensee within the meaning of the Act and put the claimants to proof. No evidence about this was led by either side and it was not mentioned in opening. In the written closing submissions L’Oréal submitted that the claimants had failed to prove that the second claimant was an exclusive licensee and so the action as brought by that company should be dismissed. In response the claimants submitted that following a debate about this at the CMC disclosure of the relevant licences had been given, the documents were in a disclosure list and there was no issue about their authenticity. Mr Purvis QC for Olaplex handed up the documents and submitted they showed that the second claimant was an exclusive licensee. L’Oréal’s case in response was that the materials did not establish that the second claimant was an exclusive licensee. Mr Chacksfield for L’Oréal handed up a clip of extracts from some further documents to explain the point.

Taken as a whole the documents show the following:

The relevant provisions of the Act are s67 itself and the definition of exclusive licence in s130(1). Mr Chacksfield’s referred to Dendron v University of California [2004] EWHC 1163 (Ch), [2004] FSR 43. He submitted that this case was authority for the proposition that the holder of what purports to be an exclusive licence, who grants a licence to another party, is not then an exclusive licensee within the meaning of the Act and has no right to bring proceedings. In my judgment that submission is wrong. Dendron is authority for the proposition that an exclusive licensee A, who grants an exclusive licence to another party B, is no longer an exclusive licensee. The exclusive licensee is now B. B would have the right to sue but not A. In this I am assuming a simple case in which there is only one patent and all the acts exclusively licensed to A are then exclusively sub-licensed to B.

However Dendron is concerned with exclusivity. What Dendron is not authority for is the wider submission made by counsel, that if A is an exclusive licensee and had granted a non-exclusive licence to B, somehow A’s status as an exclusive licensee is undermined. That is simply not what the judge was addressing in Dendron. Indeed Pumfrey J made the point that the Act contemplates that an exclusive licence within section 67 can include the power to grant sublicences. In my judgment the holder of an exclusive licence can grant non-exclusive licences without undermining their status as an exclusive licensee under the act. The exclusive licensee in that situation still has the right to exclude all other persons, including the patent proprietor, from working the invention. The words of s130 show that “other persons” means other than himself and persons authorised by him.

So in order for L’Oréal’s point to succeed the facts must be that despite terminating the exclusive licence by the 30^th November 2016 email, Anglo’s position remains that of an exclusive licensee under the patent. The fact that Anglo may retain some form of

It was not clear to me whether L’Oréal actually submitted that Anglo was still an exclusive licensee despite the termination of the exclusive licence by the 30^th November

Paragraph 9 states that Mr Sheraton may have misunderstood something Mr Bennett had said. Mr Bennett then refers to the termination email and states that “The termination of the patent licence does not impact the business relationship between the claimants. Anglo and its subsidiary Star continue to distribute the Olaplex product on behalf of Olaplex in certain territories on the same terms as before the amendment agreements were made.”

Reading paragraph 9 in context, I do not accept the submission, if made, that Anglo remained an exclusive licensee under the patent after the termination. I appreciate that the original distributorship agreement appoints Anglo as exclusive distributor of the product and so one might be tempted to argue that if that amounted to an implicit exclusive licence under the patent (despite the patent only being added into the agreement by amendment later) then the reference by Mr Bennett to the relationship continuing under the same terms as before could be said to imply that that implicit exclusive patent licence continues. But this is far fetched. The email clearly and expressly terminated the exclusive patent licence. No doubt the business relationship continued entirely as before but the legal relationship after that did not involve Anglo having an exclusive patent licence.

Therefore I find that from 14^th December 2016 Olaplex, LLC was the exclusive licensee under the patent and remains so. Prior to 31^st October 2016 Olaplex, LLC only had a non-exclusive licence under the patent and so had no right to sue under s67. In the six week period in between, although Olaplex, LLC had what purported to be an exclusive licence, on the authority of Dendron, it was not an exclusive licensee under the Act and had no right to sue because Olaplex, LLC had granted an exclusive licence to Anglo which remained in force until 14^th December 2014.

Since the second claimant’s right to sue has been perfected during the proceedings, the fact it had no right to sue on the day the claim form was issued will have an effect on damages but does not have an effect on any forward looking relief such as an injunction.

Claims 1 to 10 of the patent are invalid. So are claims 1 to 10 of the amendments in Fall Back 2. Claim 11 as unconditionally amended is valid and infringed.