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Beware Enablement of Genus Antibody Claims

by | Oct 5, 2023 |

The US Court of Appeals for the Federal Circuit invalidated yet another set of antibody genus claims, finding the case “materially indistinguishable” from those in the 2023 Supreme Court of the United States case, Amgen v. Sanofi. The Federal Circuit concluded that patent claims covering a class of antibodies targeting functions of blood clotting factors were invalid for lack of enablement, echoing the reasoning followed by fellow Circuit Judge Dyk, who sat by designation in the district court. Baxalta Inc. and Baxalta GMBH v. Genentech, Inc., Case No. 2022-1461 (Fed. Cir. Sept. 20, 2023) (Moore, Clevenger, Chen, JJ.)

This case involves Baxalta’s patent covering antibody preparations that bind to blood clotting Factors IX/IXa and thereby increase the procoagulant activity of Factor IXa. This in turn activates another blood clotting factor, Factor X, that is useful to treat hemophilia, particularly in patients who develop inhibitors to blood clotting Factor VIII. The claim at issue recited “[a]n isolated antibody or antibody fragment thereof that binds Factor IX or Factor IXa and increases procoagulant activity of Factor IXa.”

Baxalta sued Genentech for infringement. In a prior appeal involving claim construction, the Federal Circuit vacated the district court’s grant of summary judgment of noninfringement and remanded for further proceedings. On remand, the district court granted Genentech’s motion for summary judgment for lack of enablement. Baxalta appealed.

Baxalta challenged the summary judgment of invalidity on enablement. Baxalta argued that a skilled artisan could make the full scope of the claimed antibodies without undue experimentation. With reference to the subject patent’s disclosure of using a prior art method known as the hybridoma technique for generating Factors IX/IXa antibodies, Baxalta argued that using routine screenings to find the antibodies exhibiting the claimed functions (i.e., those that bind Factors IX/IXa and increase procoagulant activity of Factor IXa) was within the skill of a skilled artisan without undue experimentation.

The Federal Circuit, citing Amgen, explained that the enablement standard under Section 112(a) requires that “the specification [] enable the full scope of the invention as defined by its claims,” allowing for “a reasonable amount of experimentation.” The Court explained that in Amgen, the patents at issue generically claimed all antibodies that bind to specific amino acid residues on a protein and blocked the protein from binding to LDL receptors. The Court observed that while the Amgen patent disclosed amino acid sequences of 26 antibodies, the claim scope could cover millions. Similarly, the Amgen patent disclosed a roadmap and another conservative substitution method for generating new antibodies and testing them for the claimed functions. In Amgen, the Supreme Court held that such methods were nothing more than “trial-and-error experimentation,” which, in the absence of “some general quality . . . running through the class that gives it a peculiar fitness for the particular purpose,” failed to enable the full scope in that case.

The Federal Circuit found the facts in this case “materially indistinguishable” from Amgen. Like the claims at issue in Amgen, Baxalta’s patent claims all [...]

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No Need To Be Explicit: Implicit Finding of Expectation of Success Is Sufficient

by | Oct 5, 2023 |

The US Court of Appeals for the Federal Circuit affirmed a Patent Trial & Appeal Board unpatentability decision, finding that a combination of prior art references only requires an implicit indication of a reasonable expectation of success. Elekta Ltd. v. Zap Surgical Systems, Case No. 21-1985 (Fed. Cir. Sept. 21, 2023) (Reyna, Stoll, Stark JJ.)

Elekta owns a patent directed to a “method and apparatus for treatment by ionizing radiation.” The claimed invention uses a radiation source such as a linear accelerator (linac) mounted on concentric rings to deliver a beam of ionizing radiation to a target area on the patient. Zap challenged the patent as obvious in an inter partes review (IPR) proceeding. In its Final Written Decision, the Board agreed, concluding that a skilled artisan would have been motivated to combine the asserted prior art references. Elekta appealed.

Elekta raised three arguments on appeal:

  1. The Board’s findings on motivation to combine were not supported by substantial evidence.
  2. The Board failed to make any findings (explicit or implicit) on a reasonable expectation of success.
  3. Even if the Board made such findings, they were not supported by substantial evidence.

The Federal Circuit first considered the issue of motivation to combine the prior art references disclosing radiation imagery with references disclosing radiation therapy, noting that the obviousness determination does not always require the prior art to expressly state a motivation for every obviousness combination. Elekta had challenged the asserted combination based on a physical impracticality in combining the art due to the weight of the linac. The Board, however, disagreed largely because of the level of skill in the art in addition to its definition of the relevant field as one that “includes the engineering design of sturdy mechanical apparatuses capable of rotationally manipulating heavy devices.” The Court found that the Board’s finding of motivation to combine was supported by substantial evidence, including the prosecution history, the prior art teaching and the expert testimony of record.

The Federal Circuit next considered Elekta’s argument that the Board erred by failing to articulate findings on reasonable expectation of success. The Court explained that “an obviousness determination requires finding that a person of ordinary skill in the art would have had a reasonable expectation of success,” referring to “the likelihood of success in combining references to meet the limitations of the claimed invention.” The Court concluded, however, that unlike the motivation to combine determination, which must be an explicit analysis under KSR, a finding of reasonable expectation of success may be implicit. The Court acknowledged that this could be seen as being in tension with its review of Board determinations under the Administrative Procedure Act but concluded that “there is no such tension where the Board makes an implicit finding on reasonable expectation of success by considering and addressing other, intertwined arguments, including . . . those [regarding] a motivation to combine.”

Finally, the Federal Circuit addressed Elekta’s argument that, even if the Board made an implicit finding on reasonable expectation of [...]

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Don’t Be So Stern: Copying Carries Significant Weight in Assessing Objective Evidence

by | Aug 31, 2023 |

The US Court of Appeals for the Federal Circuit vacated and remanded a Patent Trial & Appeal Board decision invalidating a patent, finding that the Board erred in assessing nexus and weight to be accorded to objective evidence of nonobviousness. Volvo Penta of the Americas, LLC v. Brunswick Corp., Case No. 22-1765 (Fed. Cir. Aug. 24, 2023) (Moore, Lourie, Cunningham, JJ.)

Volvo Penta owns a patent directed to a tractor-type stern drive for a boat. A stern drive is a type of engine that is mounted in the hull of a boat and connected to a drive unit mounted outside of the hull, typically on the stern. In the industry, this arrangement is often referred to as an inboard/outboard drive. In 2015, Volvo Penta launched its commercial embodiment of the patent called the Forward Drive and was popular particularly for wake surfing and other water sports. The Forward Drive included forward-facing propellers that increased the distance between the propeller and swimmers or surfers compared to prior pulling-type stern drive boats.

In August 2020, Brunswick launched its own drive, the Bravo Four S, which embodies Volvo Penta’s patent. On that same day, Brunswick filed a petition for inter partes review asserting that the challenged claims were anticipated or obvious based on several references, two of which were Kiekhaefer and Brandt. In response, Volvo Penta argued that a person of ordinary skill in the art would not have been motivated to combine Kiekhaefer and Brandt with a reasonable expectation of success and that the objective indicia of nonobviousness overcame any prima facie case of obviousness. In support, Volvo Penta offered evidence of copying, industry praise, commercial success, skepticism, failure of others and long-felt but unsolved need. Volvo Penta also argued that it was entitled to a presumption of nexus between the objective indicia and the claimed invention, and, even if there was no presumption, there was still nexus.

The Board found that Kiekhaefer did not anticipate the challenged claims, but it would have been obvious to redesign the stern drive of Brandt in light of Kiekhaefer’s outboard motor to arrive at the challenged claims. After finding a motivation to combine (and prima facie obviousness), the Board turned to Volvo Penta’s objective evidence of nonobviousness. The Board first determined that Volvo Penta was not entitled to a presumption of nexus because, even though the Forward Drive and Bravo Four S indisputably embody the challenged claims, Volvo Penta did not make sufficient arguments on coextensiveness. The Board also found that regardless of the presumption, Volvo Penta did not otherwise show nexus because it failed to identify the “unique characteristics” or “merits” of the claimed invention.

Despite finding no nexus, the Board still analyzed the objective evidence and concluded that Volvo Penta’s objective evidence weighed somewhat in favor of nonobviousness but that Brunswick’s strong evidence of obviousness outweighed the objective evidence. The Board therefore concluded that the challenged claims were unpatentable. Volvo Penta appealed.

Volvo Penta raised three primary arguments on appeal:

  1. The Board’s [...]

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Don’t Ruin Today’s CNS with Yesterday’s Problems

by | Aug 10, 2023 |

The US Court of Appeals for the Fifth Circuit reversed a district court’s trademark invalidity finding based on lack of subject matter jurisdiction because a covenant not to sue (CNS) issued by the trademark owner precluded any reasonably expected future injury that the alleged infringer might incur. Nursery Decals & More, Inc. v. Neat Print, Inc., Case No. 22-10065 (5th Cir. Aug. 1, 2023) (Haynes, Engelhardt, JJ.; deGravelles, Dist. J., sitting by designation) (per curiam).

Neat Print and Nursery Decals sold novelty t-shirts on online marketplaces. In 2018, Neat Print notified one of the online marketplaces that Nursery Decals’ products allegedly infringed Neat Print’s trademarks. In response, the online marketplace sent Nursery Decals a final warning threatening a site ban for any future violations. Nursery Decals complied with the warning and also preemptively pulled its products from other online marketplaces.

Nursery Decals sued Neat Print in the Northern District of Texas. Most of Nursery Decals’ claims were directed to invalidating Neat Print’s trademarks or obtaining a noninfringement judgment. Nursery Decal also included three claims seeking damages. One was a federal claim for fraud on the US Patent & Trademark Office (PTO). The other two claims were Texas law claims based on tortious interference with an existing business relationship and a prospective business relationship. The district court ultimately granted summary judgment on all of the trademark-related claims, ordering the PTO to cancel all of the disputed trademarks.

Prior to the district court’s summary judgment grant, Neat Print tried to avoid summary judgment by filing a CNS along with a motion to dismiss for lack of subject matter jurisdiction. The district court denied the motion to dismiss, concluding that the CNS did not moot the case. The district court explained that Neat Print’s CNS did not address Nursery Decals’ past and potential future injuries (i.e., Nursery Decals’ damages claims). The district court also found that Neat Print’s CNS did not meet the high standard set forth in the Supreme Court’s 2013 decision in Already, reasoning that Neat Print’s CNS left the door open for future take-down notices based on the disputed trademarks.

Neat Print amended its CNS to address take-down notices. It then filed a motion to reconsider its motion to dismiss in light of the modified CNS. The district court orally denied the motion at the pretrial conference and ordered that the case proceed to trial. The jury ultimately found no liability on both claims. After the trial, the district court issued a written opinion explaining that it rejected Neat Print’s motion for reconsideration because Nursery Decals had a legally cognizable injury that supported subject matter jurisdiction. While Neat Print had defeated all of Nursery Decals’ damages claims, Neat Print appealed the district court’s judgment with respect to the trademark claims, arguing that the district court failed to properly evaluate subject matter jurisdiction on a claim-by-claim basis in view of Neat Print’s CNS.

The Fifth Circuit agreed with Neat Print, finding that the district court committed two errors. First, the district [...]

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No Need for Unnecessary RPI Determinations

by | Jul 27, 2023 |

The US Patent & Trademark Office Director partially vacated the Patent Trial & Appeal Board’s real-party-in-interest (RPI) determination because that determination was not necessary to resolve the underlying proceeding. Unified Patents, LLC v. MemoryWeb, LLC, IPR2021-01413, Paper 76 (PTAB May 22, 2023) (Vidal, Dir.)

Unified Patents filed a petition requesting inter partes review (IPR) of a patent owned by MemoryWeb. In its petition, Unified certified that it was the only RPI. Prior to institution, both parties briefed whether Unified should have identified two third parties as RPIs under 35 U.S.C. § 312(a)(2). In its institution decision, the Board declined to determine whether the third parties were RPIs because there was no allegation in the proceeding of a time bar or estoppel based on there being an unnamed RPI, and therefore the proceedings would not have created a time bar or estoppel under 35 U.S.C. § 315 even if the third parties were included as RPIs.

After institution, MemoryWeb continued to argue that the Board should terminate the proceeding because of Unified’s alleged failure to name the third parties as RPIs while also arguing that in the alternative, the Board should find the two third parties estopped from challenging the validity of the claims at issue in two different IPRs covering the same patent. The Board then issued an order identifying the third parties as RPIs, explaining that it was now appropriate to determine whether the two third parties were RPIs “[b]ecause the issue of Section 315(e) estoppel has been put before us [as relevant to the subsequent IPR challenges filed by the third parties], and we now have a complete factual record available to fully address the RPI question, and to avoid unnecessary prejudice to Patent Owner.” The Board also explained that it was now necessary to determine whether the third parties were RPIs in the case at hand to determine whether they would be estopped in a subsequent proceeding.

Unified filed a request for Director review of the Board’s RPI determination. Unified argued that the panel erred by issuing a non-binding advisory opinion on RPI that prejudiced the third parties by prejudging the RPI issue without their participation and where the decision could bind them in their later-filed proceedings. Unified also cited the Board’s precedential decision in SharkNinja v. iRobot, arguing that the Board should not resolve an RPI issue when it would not create a time bar or estoppel under 35 U.S.C. § 315 in the proceeding.

The Director concluded that the Board can and should determine the RPIs or real parties in privity in a proceeding where that determination may impact the underlying proceeding, including (but not limited to) a time bar under 35 U.S.C. § 315(b) or estoppel under 35 U.S.C. § 315(e) that might apply. However, the Director determined that such was not the situation here since determining the RPI issue was not necessary to resolve the proceeding. The Director, therefore, vacated the Board’s RPI determinations.



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Speculative Injury from Rulemaking Petition Denial Doesn’t Confer Standing

by and | Jul 20, 2023 | ,

The US District Court for the District of Columbia affirmed the dismissal of a case alleging that the US Patent & Trademark Office (PTO) violated the Administrative Procedure Act (APA) by denying the plaintiffs’ rulemaking petition. The district court found that the plaintiffs’ alleged injury was too speculative to confer Article III standing. US Inventor, Inc. v. US Patent and Trademark Office, Case No. 22-2218 (D.D.C. July 12, 2023) (Bates, J.)

Under the America Invents Act (AIA), the Patent Trial & Appeal Board may hear challenges to the validity of patents through inter partes review (IPR) and post-grant review (PGR). The decision to initiate a review is made at the discretion of the PTO on a case-by-case basis. US Inventor, Inc., and National Small Business United (collectively, NSBU) filed a rulemaking petition with the PTO, arguing that the PTO unlawfully designated cases as precedential or informative without putting those considerations through notice-and-comment rulemaking, as required by the APA. NSBU expressed the same position in a previous lawsuit filed in the Eastern District of Texas that was dismissed for lack of standing—a decision upheld by the US Court of Appeals for the Fifth Circuit. NSBU subsequently filed a lawsuit in the District of Columbia. The PTO filed a motion to dismiss for lack of standing.

In a motion to dismiss, a court will accept facts alleged in the complaint as true but will not assume the truth of legal conclusions. The District of Columbia noted that not every denial of a rulemaking petition confers standing on the petitioner. Standing is established by claiming an injury in fact that can be traced to the defendant’s actions and is likely to be redressed by the court. Therefore, a plaintiff must show that the denial of the petition caused a concrete injury in fact. Injury in fact must be concrete, particularized and not conjectural or hypothetical. Standing can be established via associational standing or organizational standing. Here, the court found that NSBU could establish neither.

In finding no associational standing, the District of Columbia agreed with the PTO that NSBU’s theory of injury was too speculative and not concrete. NSBU proposed an “uncertain series of events” that could lead to an alleged injury, but the court rejected the claim as attenuated conjecture based on the actions of independent third parties (similar to the fact pattern in the Supreme Court’s 2013 decision in Clapper v. Amnesty Int’l USA.)

The District of Columbia heavily criticized the first step of NSBU’s proposed series of events, which was that a valid IPR or PGR would have to be filed on behalf of a patent held by a member of NSBU’s organizations. The court found that identifying potential members that might face IPR or PGR proceedings if a third party decided to bring a claim against them was too hypothetical and relied entirely on the actions of a third party.

The District of Columbia also disagreed with NSBU’s reliance on statistics. NSBU argued that patent cancellation is more likely [...]

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Inventorship Hosed Clean: Contribution, Corroboration and Collaboration Prove Joint Invention

by | Jun 22, 2023 |

The US Court of Appeals for the Federal Circuit affirmed a decision to correct inventorship, finding that the alleged joint inventor’s contribution to a claimed invention was significant and adequately corroborated by evidence. Blue Gentian, LLC v. Tristar Products, Inc., Case Nos. 21-2316; -2317 (Fed. Cir. June 9, 2023) (Prost, Chen, Stark, JJ.)

Blue Gentian owns utility and design patents directed to an expandable hose. Prior to filing the first patent application, Michael Berardi (the sole inventor of the asserted patents and Blue Gentian’s principal) met with non-party Gary Ragner to discuss investing in Ragner’s expandable hose. Berardi had no experience designing hoses at the time of the meeting. Berardi testified that he came up with the idea of his hose after watching a demonstration video of Ragner’s hose but before the meeting. At the meeting, Ragner disclosed a prototype and documents relating to his hose and discussed the inner components of the hose. Berardi built his first prototype a day after the meeting and filed his first patent application three months later. Blue Gentian subsequently filed suit against Tristar for infringement of its expandable hose patents. Tristar counterclaimed to correct inventorship of the patents, alleging that Ragner should have been named a co-inventor.

A court may order a correction of inventorship when it determines that an inventor has been erroneously omitted from a patent. The inventors listed on an issued patent, however, are presumed to be the only true inventors. Thus, a party must prove incorrect inventorship by clear and convincing evidence. An alleged joint inventor’s testimony standing alone is insufficient to establish inventorship by clear and convincing evidence; the testimony must be corroborated by evidence. A joint inventor must contribute significantly to the invention’s conception or reduction to practice, and the contribution must involve some collaboration with the other inventor.

The district court, after an evidentiary hearing, entered judgment on the inventorship counterclaim in Tristar’s favor and ordered correction of the patents under 35 U.S.C. § 256. Blue Gentian appealed.

The Federal Circuit found that Ragner conveyed three key elements of the hose to Berardi at the meeting and that these elements were a significant contribution to the conception of at least one claim of each asserted patent. The Court noted that these were the very elements Blue Gentian used to distinguish the invention from the prior art, establishing the element’s significance. The Court also found that Ragner’s testimony about conveying the three elements to Berardi at the meeting was adequately corroborated by both physical and circumstantial evidence. The evidence showed the similarity between Ragner’s disclosed prototype and Berardi’s first prototype, and documentary evidence showed Ragner’s familiarity with the three elements before the meeting. Finally, the Court found sufficient collaboration between Berardi and Ragner based on the information exchanged at the meeting, including Ragner’s prototype, confidential documents and verbal explanations about alternative hose designs.

The Federal Circuit dismissed Blue Gentian’s argument that claim construction was needed before analyzing Ragner’s contribution because Blue Gentian did not identify a dispute [...]

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Absent Nexus Secondary Considerations Come in Second

by and | Jun 15, 2023 |

Addressing the nexus between a secondary consideration and the claimed invention in assessing obviousness, the US Court of Appeals for the Federal Circuit reversed a Patent Trial & Appeal Board finding of nonobviousness because the Board erred in its nexus analysis regarding secondary considerations. Yita LLC v. MacNeil IP LLC, Case Nos. 22-1373; -1374 (Fed. Cir. June 6, 2023) (Taranto, Chen, Stoll, JJ.)

Yita petitioned for inter partes review (IPR) of all claims of two patents. The patents share a common specification and cover vehicle floor trays that are theraformed from a polymer sheet of substantially uniform thickness. These trays (illustrated below) were designed to closely conform to the walls of the vehicle foot well so that the trays would stay in place once installed.

The Board found that the claims of one of the patents were not obvious even though an artisan would have been motivated to combine the prior art asserted (which disclosed the “close conformance” limitation) and would have had a reasonable expectation of success because the evidence of secondary considerations was overpowering and included a nexus between the evidence of success and the patented invention. The Board also found that the claims of the other patent were not obvious because the “1/8 inch limitation” regarding the thickness of the foot well was not disclosed in the prior art. The Board declined to consider Yita’s argument, which was raised for the first time in its reply brief. Yita appealed.

Yita argued that the Board committed a legal error in its analysis of the secondary consideration evidence for the first patent and abused its discretion by not considering the argument Yita raised in its reply brief regarding the other patent.

On the secondary considerations issue, the Federal Circuit explained that the Board erred in finding a nexus between the secondary consideration evidence of success and the claimed invention because the Board exclusively related to a feature that was well-known in the prior art (i.e., the close conformance between the tray and the vehicle floor). The Court explained that where the prior art teaches a well-known feature and an artisan would have been motivated to combine such prior art with an expectation of success, any secondary consideration that is exclusively related to the well-known feature will not rescue the claim from obviousness. The Court noted that while secondary considerations can be linked to an individual element of the claimed invention or to an inventive combination of elements, here the Board relied on secondary consideration evidence that was related entirely to the already well-known close conformance of the tray and vehicle floor.

The Federal Circuit next addressed Yita’s argument that the Board should have considered an argument raised in Yita’s reply brief regarding the 1/8-inch limitation. Yita failed to raise the argument that it would have been obvious to modify a prior art reference to arrive at the “1/8 inch limitation” [...]

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Obviously Prima Facie Case Overcome by Secondary Considerations

by | Jun 15, 2023 |

The US Court of Appeals for the Federal Circuit affirmed the Patent Trial & Appeal Board, holding that the Board did not err in finding certain challenged claims nonobvious and not unpatentable based on a showing of several objective criteria of nonobviousness and a nexus of the evidence to a commercial product embodying the claimed invention. Medtronic, Inc. v. Teleflex Innovations S.A.R.L., Case No. 21-2357 (Fed. Cir. June 05, 2023) (Moore, C.J.; Lourie, Dyk, JJ.) and Medtronic, Inc. v. Teleflex Innovations S.A.R.L., Case No. 21-2359 (Fed. Cir. June 05, 2023) (Moore, C.J.; Lourie, Dyk, JJ.)

Teleflex developed and patented a novel catheter-based stenosis intervention system that successfully mitigated long-standing risks intrinsic to existing catheter-based intervention systems, in particular damage to the coronary artery from guide catheter dislodgement or a catheter’s distal tip (i.e., the end of the catheter farthest from the insertion site). The preferred embodiments incorporated into Teleflex’s extremely successful GuideLiner products comprised a proximal substantially rigid portion (yellow), a reinforced portion (blue) and a distal flexible tip (pink), as illustrated below.

The catheters were sized so they could be inserted through standard guide catheters and thus were coined guide extension catheters. This innovative nesting feature increased guide catheter backup support while the guide extension catheter’s soft distal end was less likely to cause tissue damage once deeply inserted into patients. Teleflex’s guide extension catheters also were optimized for receiving interventional cardiological devices. This optimized function was a combination of the catheter’s coaxial lumen, that lumen’s diameter being no more than one French (i.e., 1/3 mm) less than the diameter of the guide catheter, and a proximal side opening that featured a double incline design like that illustrated above.

Teleflex’s GuideLiner was introduced in 2009 and enjoyed “undisputed commercial success and industry praise.” In 2019, Medtronic introduced its competing guide extension catheter (Telescope) and filed six inter partes review (IPR) petitions against Teleflex’s extension guide catheter family. Three of Medtronic’s petitions asserted that the challenged claims in three of Teleflex’s patents were obvious over the evacuation sheath assembly with a distal side opening used to aspirate embolic material while occluding blood flow using sealing balloons disclosed in a prior art reference (Ressemann). The other three petitions challenged claims of the other Teleflex patents as being obvious over a support catheter for delivering angioplasty balloons disclosed in a prior art reference (Kontos).

Medtronic specifically asserted that the following three elements of Teleflex’s claimed catheters were obvious:

  1. A proximal side opening. Medtronic argued that it would have been obvious to replace the proximal funnel structure of Kontos’s support catheter with the distal side opening of Ressemann’s evacuation sheath assembly.
  2. A catheter diameter that is no more than one French less than a corresponding guide catheter. Medtronic argued that in view of prior art mother-and-child dual catheter systems in which the child catheter’s diameter is no more [...]

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Well Runs Dry: Summary Judgment Denial Supports Non-Exceptional Case Finding

by | Jun 1, 2023 |

The US Court of Appeals for the Federal Circuit affirmed a district court’s denial of attorneys’ fees, explaining that when a district court denies summary judgment and allows a plaintiff’s case to proceed, the district court effectively determines that the position of the party opposing summary judgment is not objectively baseless. OneSubsea IP UK Limited v. FMC Techs, Inc., Case No. 22-1099 (Fed. Cir. May 23, 2023) (Moore, Clevenger, Dyk, JJ.)

OneSubsea and FMC compete in the subsea oil and gas exploration and extraction industry. In March 2015, OneSubsea filed a lawsuit against FMC alleging infringement of 95 claims across 10 OneSubsea patents. After the district court issued its claim construction ruling, FMC moved for summary judgment of noninfringement. OneSubsea opposed. While the summary judgment motion was pending, the Patent Trial & Appeal Board instituted inter partes review (IPR) proceedings on a subset of the asserted patents. FMC argued that while a stay of district court proceedings would be appropriate, it was unnecessary in light of its pending summary judgment motion. In August 2016, the district court denied summary judgment and stayed the case.

The case remained stayed for three years, during which time the Board invalidated 76 claims. In 2019, the district court lifted the stay. At a pre-trial hearing in 2020 discussing whether additional discovery was needed to address summary judgment, FMC doubted the need for more discovery and pointed to the 3,200 record pages illustrating differences between the designs of the accused device and the patented devices. In response, the district court stated, “And you really think I’m going to be able to grant summary judgment on that?” After the hearing, FMC renewed its summary judgment motion, which OneSubsea opposed. In reply, FMC moved to exclude the report of OneSubsea’s expert because he applied the wrong claim construction. Ultimately, the district court granted FMC’s motion to exclude and its motion for summary judgment.

In 2021, FMC moved for attorneys’ fees based on OneSubsea’s “substantively weak infringement claims” after the claim construction order was issued and “litigation misconduct.” After briefing was complete, the district court announced that the case had been reassigned to another judge following the retirement of the original assigned judge. The new judge rejected FMC’s view that OneSubsea’s case was objectively baseless and further rejected FMC’s claims of litigation misconduct. FMC appealed.

As a threshold matter, FMC argued that the Federal Circuit should apply de novo review instead of an abuse-of-discretion standard because the new judge only briefly “lived with the case” and should be disqualified from exercising discretion in deciding FMC’s attorneys’ fees motion. The Court rejected FMC’s invitation to change the standard of review, citing the substantial body of law in which appellate courts have consistently reviewed successor judges’ decisions on discretionary issues for abuse of discretion.

Turning to the merits, the Federal Circuit found that FMC’s exceptional case argument lacked merit. The Court explained that the argument disregarded the district court’s observation that FMC’s demand for a prompt favorable noninfringement judgment based [...]

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