News & Analysis as of

Final Written Decisions Estoppel Patent Invalidity

Sterne, Kessler, Goldstein & Fox P.L.L.C.

2023 PTAB Year in Review: Analysis & Trends: The Changing Contours of IPR Estoppel Law

As any PTAB practitioner knows, the possibility of being estopped from asserting prior art in district court is a significant risk that must be considered when filing an IPR. Section 315(e)(2) prevents a petitioner, following...more

Jones Day

PTAB Doubles Down on Interference Estoppel Issue

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The Patent Trial and Appeal Board held all challenged claims of IGT’s patent unpatentable as obvious over two prior art patents. Zynga Inc. v. IGT, IPR2022-00199-32. In doing so, the PTAB further held that, contrary to...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

[Webinar] 2022 PTAB Year in Review: Analysis and Trends - February 28th, 1:00 pm - 2:00 pm EST

Speakers will offer updates, case summaries, and analysis of the significant 2022 PTAB guidance, actions, and rulings. Topics include: the Director’s 2022 Fintiv guidance, PTAB discretionary denial, the use of applicant...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2022 Decisions: Intuitive Surgical, Inc. v. Ethicon LLC, 25 F.4th...

Intuitive filed three IPR petitions, all on the same day, challenging Ethicon’s endoscopic surgical instrument patent. The petitions challenged overlapping claims based on different combinations of prior art references. The...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2022 Decisions

As part of the recovery from the global COVID-19 pandemic, the U.S. Court of Appeals for the Federal Circuit took steps to return to normal operations. It began requiring live oral arguments in August 2022 and, by November,...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

[Webinar] Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2022 Decisions - February 2nd, 1:00 pm - 2:00 pm EST

In conjunction with the release of the firm's year-in-review report, speakers will offer case summaries and analysis of the significant 2022 appellate rulings discussed in the report. Topics of the featured intellectual...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

2021 PTAB Year in Review: Analysis & Trends: IPR Estoppels: A Power Imbalance for Plaintiffs and Defendants

Inter partes review (IPR) proceedings raise complex estoppel issues that courts are grappling with and patent litigants must consider. Because patent challengers can assert invalidity in three different tribunals (the...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

2021 PTAB Year in Review: Analysis & Trends

[co-author: Jamie Dohopolski] Love it or hate it, ignore the USPTO Patent Trial and Appeal Board (PTAB) at your peril. The introduction of the PTAB as part of the America Invents Act over ten years ago has forever changed...more

Akin Gump Strauss Hauer & Feld LLP

Federal Circuit Clarifies Scope of IPR Estoppel, Reversing Prior Shaw Decision

The Federal Circuit recently clarified that the scope of IPR estoppel in district courts includes prior art grounds that were raised or reasonably could have been raised in a petition for inter partes review (IPR), reversing...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

PTAB Strategies and Insights - May 2021

The PTAB Strategies and Insights newsletter provides timely updates and insights into how best to handle proceedings at the USPTO. It is designed to increase return on investment for all stakeholders looking at the entire...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2020 Decisions: Network-1 Tech., Inc. v. Hewlett-Packard Co. et....

Network-1 sued HP, among others, for patent infringement. Another defendant then filed an inter partes review (IPR) petition. Following institution, HP filed its own petition on different grounds and a motion to join the...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2020 Decisions

[co-author: Kathleen Wills] Last year, the global COVID-19 pandemic created unprecedented challenges for American courts. By making several changes, however, the U.S. Court of Appeals for the Federal Circuit was able to...more

Jones Day

Estoppel Estopped for Remanded Claims

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In General Access Sols., Ltd. v. Sprint Spectrum, et al., No. 2:20-cv-00007-RWS, ECF No. 128 (E.D. Tex. Dec. 1, 2020), the Eastern District of Texas denied a motion to strike invalidity defenses as barred by IPR estoppel for...more

Jones Day

Reminder: Estoppel May Not Preclude Prior-Art Systems

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The estoppel statute precludes a defendant who has challenged a claim in an IPR reaching final written decision from later challenging that claim on any ground that it raised or reasonably could have raised during the IPR...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

PTAB Strategies and Insights - October 2020: Joinder Petitioner Has Different § 315(e)(2) Estoppel Than Original Petitioner

In Network-1 Technologies, Inc. v. Hewlett-Packard Company, the Federal Circuit vacated and remanded the district court’s holding that joinder petitioner Hewlett Packard (“HP”) (1) could have tried to raise new grounds in its...more

Goodwin

Issue Twenty-Nine: PTAB Trial Tracker

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The availability of post-grant proceedings at the Patent Trial and Appeal Board (PTAB) has changed the face of patent litigation. This monthly digest is designed to keep you up-to-date by highlighting interesting PTAB,...more

Akin Gump Strauss Hauer & Feld LLP

District Court Rejects Plaintiff’s Bid to Extend IPR Estoppel to Institution Denials

A federal judge in the Northern District of California recently rejected an argument that would have expanded inter partes review (IPR) estoppel seemingly beyond the plain reading of 35 U.S.C. § 315(e)(2). The plaintiff had...more

Akin Gump Strauss Hauer & Feld LLP

Invalidity Defenses Will Not Be Stricken at Pleading Stage Despite Defendant’s Earlier PGR Petition

A district court has denied a patent owner’s motion to strike wholesale a defendant’s affirmative defense of invalidity. The key issue in the motion to strike was the application of the estoppel provision of 35 U.S.C. §...more

Jones Day

Update: Does § 315(e)(2) Say What It Means and Mean What It Says?

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When an IPR petition results in a final written decision, the IPR petitioner (or the petitioner’s real party in interest or privy) is estopped from asserting in a civil litigation or an ITC action that “the claim is invalid...more

Akin Gump Strauss Hauer & Feld LLP

Estoppel Applies to “Known or Used” Prior Art if PTAB Considered Corresponding Written References

A district court in California has granted-in-part a Plaintiff’s motion for summary judgment of no invalidity under 35 U.S.C. § 103 due to inter partes review (IPR) estoppel. During the pendency of the litigation, Defendants...more

Mintz - Intellectual Property Viewpoints

ALJ Cheney Holds that IPR Estoppel Does Not Apply to ITC Investigative Staff

In an Initial Determination finding that Fujifilm violated Section 337 by infringing two patents held by Sony, ALJ Cheney found another patent invalid after ruling that inter partes review (“IPR”) estoppel does not apply to...more

Akin Gump Strauss Hauer & Feld LLP

Accused Infringer Estopped from Asserting Prior Art Disclosed in Invalidity Contentions

In an order issued on April 4, 2018, Judge Lynn granted plaintiff ZitoVault’s motion for summary judgment under 35 U.S.C. 315(e)(2), holding that defendant IBM is estopped from asserting invalidity defenses based on prior art...more

Knobbe Martens

Defendant Is Not Estopped from Relying on a Prior Art Reference in District Court that Is Related to a Reference Used in a CBM So...

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In Solutran, Inc. v. U.S. Bancorp & Elavon, Inc., No. 13:cv-02637, 2018 WL 1276999 (D. Minn. Mar. 12, 2018), the court denied the plaintiff’s Motion in Limine and held that CBM estoppel does not apply to related applications...more

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