IP HAPPENINGS – SEPTEMBER 2017
By Lawrence Hoffman
THE CAFC NEVER SLEEPS
While much of the IP world has been enjoying the end of the summer, or catching up on what accumulated while they enjoyed the beginning of the summer, the CAFC has been quite busy. Following are some notes on cases I found to be interesting.
Obviousness 101:
Most practitioners will agree that the methodology and substance of an obviousness determination under U.S. patent law is defined by two U.S. Supreme Court decisions: Graham v. John Deere Co. in 1966 and KSR Int’l Co. v. Teleflex Inc. in 2007. There have been some cases in the interim, but Graham defined the methodology of the inquiry and KSR identified, at least generally, the substantive considerations that might make a combination of prior art teachings obvious or unobvious to a mythical person having ordinary skill in the art.
According to Graham, there must be determined (1) the scope and content of the prior art, (2) the differences between the prior art and the claims at issue, and (3) the level of ordinary skill in the pertinent art. Graham further pointed out that certain objective (secondary) indicia of unobviousness also needed to be considered, for example, commercial success tied to novel features in the claimed patent or application, long-felt but unmet need, initial skepticism of those in the field, copying by competitors, and others.
Later appellate decisions have clarified that the first three determinations do not need to be expressed explicitly, but that it must be apparent that they all were taken into account.
Graham remained the legal standard for both methodology and substance until 2007, but it was often benignly neglected, especially as to the fourth Graham factor. Instead, examiners and courts followed the so-called “teaching, suggestion or motivation” (TSM) test articulated by the CAFC as the sole basis for a finding of obviousness and thus focused mainly on the content of the prior art with the level of skill in the art informed essentially by the TSM test.
KSR reaffirmed Graham and while it did not overrule the TSM test, it relegated it to one of several possible indicia of obviousness. The KSR Court identified predictability of results and expectations of success, combination of familiar elements according to known methods with no unexpected result, among others as indications of obviousness. An analysis of the law =ost-KSR is beyond the scope of this note, but as a practical matter, what was a reasonably objective process under the TSM test has now become, in practice, a largely subjective exercise.
The standard form paragraph U.S. examiners use to introduce obviousness rejections explicitly quotes the Graham factors, but in practice, both the PTO and the CAFC still place great emphasis on finding a motivation for modifying or combining items of prior art. Often special emphasis is placed on the KSR-articulated factor of predictability of success. Graham, however, still purports to guide the inquiry.
This may be seen quite clearly in the recent decision in Vicor Corp. v. Synqor, Inc., a technically complex case with a messy and complex procedural history arising out of several inter partes reexaminations under pre-AIA law. There were inconsistent decisions by the Patent Trial and Appeal Board on virtually identical claims, and other nastiness that we won’t go into. However, in respect to one group of claims, (“rejections III and IV”), the examiner found the claims to be patentable solely on the basis of objective evidence under the fourth Graham factor, and clearly gave no consideration to the other three factors. Nevertheless, the PTAB affirmed examiner’s methodology and decision.
In one of the related reexaminations, the board and the Examiner followed the Graham methodology, and it is not apparent why they failed to do so in this instance.
The CAFC did not treat Graham so cavalierly. While it did affirm the Board’s allowance of certain claims, with respect to rejections III and IV, the court ruled:
The Board’s decision on these proposed rejections was erroneous and must be vacated for two reasons. First, the Board improperly analyzed Vicor’s obviousness arguments under only one of the four Graham factors when it looked exclusively at the objective evidence, without considering the remaining factors and the relative strength of the factors.
The second reason is not important for our purposes here. What is important is that the court made it completely clear that Graham is still (again) alive and well. Hopefully, examiners, the PTAB, and the district courts will get the message.
How is an Obviousness Determination is Supposed to Go in the Post-KSR World?
The recent decision in In Re: Stepan Company gives some practical guidance, if not any profound insight into the law. The case arose on an appeal from a final rejection sustained by the Patent Trial and Appeal Board. The invention related to an improved herbicide composition that adhered better to the leaves of the intended victim allowing better absorption.
The base claim, which I won’t repeat verbatim because it will likely be understood only by an organic chemist and will distract everyone else, recited the combination of water, a glyphosate salt in solution in the water, and a surfactant system, with the combination having a so-called “cloud point” of at least 70° C.
Pallas (the principal reference) disclosed herbicides having similar components but specified a cloud point of “at least 50ºC and ideally 60ºC”. The examiner rejected most of the claims as obvious over Pallas, and two additional ones as obvious over Pallas in view of a secondary reference. In support of her final rejection, the examiner stated that, for the claimed ranges of the surfactants:
it is routine optimization to select and adjust the surfactants to this range since Pallas teaches the surfactant component comprises any combination of surfactants,
and that, while:
Pallas does not teach a cloud point above 70ºC . . . achieving this cloud point would be a matter of optimizing the formulation because Pallas teaches the ideal cloud point should be above 60ºC.
The Board adopted the examiner’s reasoning. It further determined that Stepan failed to rebut the examiner’s prima facie case of obviousness and affirmed the examiner’s rejections.
The CAFC held that “. . . the Board failed to adequately articulate its reasoning, erroneously rejected relevant evidence of nonobviousness, and improperly shifted to Stepan the burden of proving patentability and accordingly vacated the Board’s decision and remanded.
The court began by noting that “[A]n obviousness determination requires finding both that a skilled artisan would have been motivated to combine the teachings of the prior art . . . and that the skilled artisan would have had a reasonable expectation of success in doing so” (Internal citations and quotes omitted).
On the first point, the court criticized the Board’s decision for failing to explain why it would have been “routine optimization” to select and adjust the claimed surfactants and achieve a cloud point above at least 70ºC, saying:
The agency tribunal must make findings of relevant facts, and present its reasoning in sufficient detail that the court may conduct meaningful review of the agency action. Stating that a person of ordinary skill in the art would have arrived at the claimed invention through routine optimization falls short of this standard. Missing from the Board’s analysis is an explanation as to why it would have been routine optimization to arrive at the claimed invention.
In its brief, the PTO presented arguments to support the Board’s finding; However, the court, while observing that “this evidence could be relevant to whether there would have been a motivation to combine the claimed surfactants with a reasonable expectation of achieving a cloud point above at least 70ºC” refused to consider it because it was not part of the Board’s findings. Instead, it directed the Board to consider the proffered arguments on remand.
The court also took issue with the Board’s failure to articulate why a person of ordinary skill in the art would have had a reasonable expectation of success to formulate the claimed surfactant system with a cloud point above at least 70ºC. To have a reasonable expectation of success, the court said, “. . . one must be motivated to do more than merely to vary all parameters or try each of numerous possible choices until one possibly arrived at a successful result”. The court rejected Pallas’ teachings that “any combination” of surfactants may be used and that a cloud point above 60ºC is desired” as an insufficient explanation as to “. . . why a skilled artisan would have selected the claimed combination of surfactants and reasonably expected a cloud point above at least 70ºC.”
Further, the court criticized the Board’s erroneous rejection of what it termed evidence relevant to whether a skilled artisan would have had a reasonable expectation of success to achieve a cloud point above at least 70ºC with the claimed surfactant systems. The court declined to consider “in the first instance what weight the evidence ought to be afforded in the Board’s obviousness analysis”, but instructed the Board to do on remand.
Finally, the court held that the Board erred when it shifted the burden of proving patentability to Stepan. The PTO bears the burden of establishing a prima facie case of obviousness. “Only if this burden is met does the burden of coming forward with rebuttal argument or evidence shift to the applicant.” The Board’s reliance on case law involving a range within the prior art did not apply here since the Board’s opinion did not establish a prima facie case obviousness because it failed to adequately articulate its reasoning. In addition, the claims were not directed to a range within or overlapping with the range taught by Pallas.
In the dissent, Judge Lourie essentially argued that the majority improperly treated the cloud point recitation as a component of the composition (as which he is correct) when it should have been treated as property, i.e., as a functional limitation. And while he acknowledged that Palas disclosure non-specific in relation to the claims at issue, he noted that the claims themselves were comparably broad. We will see in the next note how the concepts of inherency and obviousness can sometimes overlap in a complex way.
Relying on instinct, and certainly not any significant knowledge of chemistry, it seems to me that Board is likely to find a way to create a sustainable obviousness record based on the court’s observations. In any event, it will be interesting to follow this matter on remand.
More on Functional Claim Language – Obvious or Inherent?
Sometimes, an obviousness determination is a straightforward search for a feature missing from a principal reference or a question of modifying a feature of the principal reference to conform to the claim under examination. The Examiner or other challenger finds the missing feature in another reference and comes up with a purported justification (motivation) for adding the feature to the principal reference. Sometimes it’s a purported justification to modify the ill-fitting feature. Ultimately, the Patent Trial and Appeal Board (PTAB) or a court has to decide if the mythical person of ordinary skill in the art would agree with the reasoning of the challenger.
It can get tricky, though, when the claim contains functional language and the claimed function is not described in the art cited by the challenger. In such cases, it often must be determined if the function is “inherent” even though not described. The recent CAFC decision in Southwire Co. v. Cerro Wire LLC is an interesting demonstration of how tricky it can get.
The question of inherency comes up most often when the issue is anticipation. Here, the well-established rule is that the claimed function must necessarily, i.e., always be present. But the question comes up sometimes when the context is obviousness. In such cases, the CAFC has cautioned that “the use of inherency . . . must be carefully circumscribed because ‘[t]hat which may be inherent is not necessarily known’ and that which is unknown cannot be obvious. Needless to say, the function must still necessarily be present.
The Southwire case arose in the context of an inter partes reexamination, an admistrative proceeding that predated the inter partes review created by the Ameroca invents Act. The Southwire, patetn claims were directed to a method of manufacturing a cable that exhibited reduced friction and required reduce pulling force when pulled through a cable passageway in a wall. The method involved combining a preselected lubricant with the material forming the cable jacket, the lubricant being “. . . of the type which migrates through said jacket to be available at said outermost exterior surface of said finished cable during the cable’s installation . . .” The claim also recited the result was at least a 30% reduction in pulling force when measured according to a test also recited in the claim. The claim did not specify the lubricant, except in functional terms.
Cerro, in attacking the Southwire patent, relied on a patent to Summers in combination with two other references. As described by the court, Summers taught a “fiber optic cable that is suitable for installation in a cable passageway” and teaches that “to reduce resistance to a cable pulling force,” the plastic material used to form the cable “can include a friction reducing additive” that “migrat[es] to the surface of the cable jacket”. Summers’ lubricant was different from that disclosed in the Southwire patent, but that was disclosed in a Dow Corning data sheet (Dow), one of the secondary references. Summers also did not expressly teach that the friction reducing additive can reduce the pulling force by “at least the recited 30%.
The Examiner handling the matter in the first instance held that the 30% reduction was inherent since the reference cable (as taught by the combination of Summers and Dow) was made by the claimed process and must therefore perform in the same way. On appeal, the PTAB affirmed the Examiner’s decision based on inherency. The Board first noted that “[w]here the claimed and prior art products are . . . produced by identical or substantially identical processes, a prima facie case of either anticipation or obviousness has been established.”
The Board was doing fine but it then muddied the waters by reasoning that the amount of lubricant would have to be enough to achieve the claimed 30% reduction, and that “because Summers teaches reducing the coefficient of friction using a lubricant, it inherently teaches the 30% reduction limitation because it renders it “obvious to have selected [lubricant] amounts” that achieve the claimed reduction.
That did not sit well with the CAFC, which stated that that “. . . the Board erred in relying on inherency without finding that Summers necessarily would achieve a 30% reduction in pulling force, but rather finding that it merely renders that limitation obvious.
Nevertheless, the court affirmed the Board’s decision on the basis that its error was harmless in that its “. . . underlying factual findings were sufficient to support an obviousness determination”. The Board decision recited in detail the evidence that the claimed method simply applies the same process for the same purpose as disclosed in Summers and that its findings were supported by substantial record evidence.
Citing prior authority that where “all process limitations . . . are expressly disclosed by [the prior art reference], except for the functionally expressed [limitation at issue],” the PTO can require an applicant “to prove that the subject matter shown to be in the prior art does not possess the characteristic relied on”, the court held that Southwire had failed to meet the requirement.
If that sounds like a different way of saying that that the applicant or patentee must demonstrate the lack of inherency when the prior art teaches everything except the functional limitation, I would have to agree.
Be that as it may, the lesson to be learned from Southwire is that the best answer to an assertion of inherency is to run tests on exactly what the prior art shows to demonstrate that the claimed function is not achieved.
What Does It Mean To “Make Something”?
Lifetime has a patent that covers a novel seal in combination with a recreational vehicle that has a moving wall. Lifetime’s competitor Trim-Lok hired away two of Lifetime’s employees and shortly thereafter, offered for sale seals as described in the patent. In its complaint for patent infringment in Lifetime Industries, Inc. v. Trim-Lok, Inc., Lifetime alleged that Trim-Lok employees installed its seals on an RV manufactured by a third party for demonstration purposes and in an effort to sell its seals. This, Lifetime asserted, constituted direct infringement of its patent.
Trim-Lok moved to dismiss for failure to state a claim for direct infringement because the patent claims are directed to the combination of the seal and an RV and it only supplied the seal. The district court agreed, and dismissed the case. On appeal, the CAFC reversed.
Under § 271(a) of the U.S. patent law, whoever without authority makes, uses, offers to sell, or sells any patented invention, within the United States . . . infringes the patent. When deciding a motion to dismiss for failure to assert a cause of action, the applicable law requires the court to “assume all well-pleaded allegations are true and [to] draw all reasonable inferences in the light most favorable to the plaintiff.”
The allegations in the complaint were sufficient to state a cause of action, said the CAFC. The alleged installation of the seals by Trim-Lok’s employees, if proven at trial, would constitute “making” the patented invention without authority. It’s hard for me to understand how the district court went wrong on this one.
Who Pays the Legal Fees of the Patent and Trademark Office Litigators?
If your U.S. patent application is finally rejected, and the rejection is affirmed by the Patent Trial and Appeal Board, you have two options for a further appeal. You can appeal directly to the CAFC, or under § 145 of the Patent Act, you can file a “Civil Action to Obtain a Patent” against the PTO in the U.S. District Court for the Eastern District of Virginia.
An advantage of a § 145 action is that new evidence can be presented that was not before the Patent and Trademark Office, while a CAFC appeal is strictly on the record below. Another possible advantage is that you can appeal the Eastern District decision to the CAFC which will then review ruling below just as in any other appeal.
There is a down side, however. § 145 further provides that the applicant must pay “[a]ll of the expenses of the proceeding”. This provision has been in the law since 1839. The CAFC has interpreted this to mean irrespective of the outcome, but until recently, there does not appear to have been a decision directly on point as to whether attorneys’ fees were included.
It all began with a final rejection of a Nantkwest application sustained by the PTAB. The applicant filed a § 145 action but lost on the merits. The PTO filed a request to include its attorneys’ fees, i.e., the salaries of the Government attorneys who defended the case, as part of the “expenses” for which Nantkwest was responsible. The district court denied the request, citing the so-called “American Rule” under which litigants pay their own attorneys’ fees, win or lose, unless a statute or contract provides otherwise. The district court, in essence, held that the term ”expenses” was not explicit enough to cover attorneys’ fees. The PTO appealed to the CAFC.
In its 23 June 2017 decision in Nantkwest v. Matal, a panel of the CAFC reversed the district court with judge Stoll dissenting. The majority relied on Supreme Court authority, the definition of “expenses” in Black’s Law Dictionary, and commentary in Wright and Miller on Federal Practice and Procedure to support its view that the commonly understood meaning of “all expenses” included attorneys’ fees. The court’s decision is, of course, of interest, but also of interest is what seems to be an angry and belittling response to the dissent.
Be that as it may, the court now seems to have had second thoughts about its decision. On 31 August 2017, the court, sua sponte (on its own initiative) ordered to rehear the matter before the full court. The parties were directed to file new briefs directed specifically to whether the three-judge panel correctly determined that the
“. . . [a]ll the expenses of the proceedings” provision [of § 145] authorizes an award of the [PTO’s] attorneys’ fees”.
What is the significance of a Claim Preamble?
Those familiar with practice in the European Patent Office know that examiners generally insist that claims be written in “two-part” format with a preamble that states the prior art environment and a “charactizing clause” that describe the invention itself.
This is not required in the U.S., and practitioners generally avoid writing claims in the two-part format (which are known in U.S. practice as “Jepson claims”) because of its potential limiting effect. As a result, a question sometimes arises as to whether a claim preamble should be given any significance in determining patentability.
In practice, examiners usually go out of their way to treat claim preambles as no more than introductory statements of intended use and give them no “patentable weight” when they inconveniently weaken a rejection.
There are two clear situations, however, in which a claim preamble must be taken into account in determining patentability, as the CAFC recently made clear in Georgetown Rail Equipment Company v. Holland, an appeal arising out of an infringement action in the U.S. District Court for the Eastern District of Texas.
The patent in suit involved technology for checking the integrity of railway tie plates which connect the rails to the wooden cross ties. The single claim involved in the litigation included as its preamble “A system for inspecting a railroad track bed . . . to be mounted on a vehicle for movement along the railroad track, the system comprising”. The body of the claim recited a light generator, an one optical receiver, and a processor for analyzing images from the optical receiver, along with the details of an algorithm that defined the operation of the processor.
Holland sold a system which Georgetown asserted infringed its patent. As a practical matter, the real difference for purposes of this note is that Holland’s processor is not on board the inspection vehicle. Instead, the optical data is collected and sent to a remote facility for processing after which a report is sent to Holland.
The trial judge construed the preamble of the claim as non-limitng and therefore that the body of the claim, which was silent as to the location of the processor, did not have to be on the inspection vehicle. Based on that construction, the jury found that Holland infringed the patent, and awarded lost profits to Georgetown in the amount of about $1.5 million. The court also awarded Georgetown an additional $1,000,000 in enhanced damages based on a finding of willful infringement and further awarded Georgetown legal based on a finding that the case was exceptional.
On appeal, Holland challenged the claim construction, the jury verdict, and the awards of enhanced damages and legal fees, but all of Holland’s challenges were rejected. For purposes of this note, we will focus only on the claim construction issue.
The District based its claim construction on its determination that the term to mounted on a vehicle did not recite an “essential structure” of the invention because the specification stated that “[a]lternatively, the computer analysis can be performed by another computer system having image processing software known in the art,” such that the system need not be performed in a vehicle. For the same reason, the phrase could not recite “additional structure or steps . . . underscored as important by the specification.”
The judge further concluded that the term was not an “antecedent basis” for the claim terms because “[t]he claim body, neither in whole [n]or in part, mentions the phrase ‘mounted on a vehicle.’” Finally, it found that Georgetown did not clearly rely on the limitation during prosecution because the cited statements from the prosecution history did not “distinguish the claimed invention from the prior art by reference to the system being mounted on a vehicle.”
In affirming the claim construction, the CAFC began with the generalization that the preamble does not normally limit the claims, but that it may be limiting in certain circumstances. These include situations in which the preamble recites essential structure, in which the claim body depends on preamble language as an antecedent basis, in which the preamble is essential to understand limitations or terms in the claim body, or there was “clear reliance on the preamble during prosecution to distinguish the claimed invention from the prior art.
Conversely, if the claim body defines a structurally complete invention and the preamble only states a purpose or intended use for the invention, it is not treated as a limitation.
The court then held that In the context of the entire patent, it is apparent that the term “mounted on a vehicle for movement along the railroad track” is meant to describe the principal intended use of the invention but not to import a structural limitation or to exclude from the reach of the claims an assembly that does not include a vehicle mount. The statement that a separate device could be used for image processing was clearly a critical factor and with the fact that the body of the claim defined a complete structure without reference to the location of the processor.
The message and lesson to be learned is clear: in an introductory part of the Detailed Description, all viable variations should be mentioned either in terms of being “optional”, or as ”alternatives”, or as ”according to some embodiments”, even if they are not further described. It looks like that one sentence made all the difference in the outcome of this case.
And Don’t Forget Eligibillity:
Visual Memory Inc. (“VMI”) has a patent on a three-tiered memory system including a mass storage component, a main memory component and a cache memory (a known computer configuration) in which the cache memory is comprised of three cache elements, the operating characteristics are programmable to optimize performance with different kinds of microprocessors. The result, according to the patent is that the cache memory is much smaller and therefore less costly than conventional cache memories, as well as equal or greater efficiency over conventional practice.
The patent also discloses a new configuration for the storage of data in the main memory which is also said to provide an additional improvement in efficiency over conventional practice.
VMI sued Invidia Corporation for infringement of the patent. Invidia filed a motion to dismiss on the ground that the claims failed the first step of the Alice test in that they were directed to the abstract idea of data classification and storage, and that there was nothing else inventive to satisfy the second part of the test. The district court granted Invidia’s motion and VMI appealed.
In Visual Memory Inc. v. Invidia Corporation, the CAFC reversed and remanded, demonstrating again how difficult for the PTO and the district courts to apply the Alice test to computer systems.
In contrast to the many cases decided by analogy to previously decided cases, a practice I have often criticized, the court presented a reasoned explanation as to why the claims were not directed to an abstract idea, but rather to an improvement in computer functionality. The claims accordingly satisfied the first step of the Alice test.
The court observed, almost incidentally, that it decision was limited to the question of eligibility, and that it was taking no position as to the normal conditions for patentability (novelty, unobviousness, clarity of the claims and sufficiency of the disclosure) which now be addressed by the trial judge and/or a jury trial.
Yes, I know that hindsight is 20-20, but it’s still hard for me to see how the district court went wrong here.
About the author: Larry Hoffman has a B.S. in Electrical Engineering and Comp. Sci. from Massachusetts. Institute of Technology and a J.D. from the George Washington University School of Law. He has been a lawyer since 1965 specializing in IP law and product liability defense. He is registered to practice before the U.S. PTO, the U.S. Court of Appeals for the Federal Circuit and the state and federal courts in New York, Maryland, and the District of Columbia. His work has included preparation and prosecution of patents in countries throughout the world, and counseling on IP and product safety matters. He has been involved in the trial of close to 100 lawsuits of various kinds. You can reach him at Lawrence@ipatent.co.il.