News & Analysis as of

Final Written Decisions Estoppel Patent Litigation

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

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

2023 PTAB Year in Review: Editors’ Introduction

A review of 2023 reveals it was an active and impactful year in shaping the policy and practice before the Patent Trial and Appeal Board (PTAB or Board) at the U.S. Patent and Trademark Office (USPTO). In fact, all three...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

McDermott Will & Emery

What Preclusion? Post-IPR Reexam Moves Forward

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The US Court of Appeals for the Federal Circuit revived a petitioner’s validity challenge seeking ex parte review at the US Patent & Trademark Office (PTO), reversing a district court decision dismissing its complaint seeking...more

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

2021 PTAB Year in Review: Analysis & Trends: Editors' Introduction

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 patent litigation. In its first...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

McDermott Will & Emery

Too Much to Say? Word Limits Don’t Prevent Estoppel

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The US Court of Appeals for the Federal Circuit found that the Patent Trial & Appeal Board (Board) did not err in finding that a petitioner was estopped from maintaining a third inter partes review (IPR) of a patent claim...more

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

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2021 Decisions: Uniloc 2017 LLC v. Facebook Inc., 989 F.3d 1018...

Facebook filed an inter partes review (IPR) petition against claims 1–8 of Uniloc 2017 LLC’s patent on Voice over Internet Protocol. Meanwhile, an IPR proceeding was already pending on claims 1–6 and 8 of the same patent,...more

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

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2021 Decisions

[co-author: Jamie Dohopolski] Last year, the continued global COVID-19 pandemic forced American courts to largely continue the procedures set in place in 2020. The U.S. Court of Appeals for the Federal Circuit was no...more

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

PTAB Strategies and Insights Newsletter - June 2021

[co-authors: Patrick Murray, Risa Rahman, and Jae Bandeh] 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...more

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

PTAB Strategies and Insights - May 2021: Federal Circuit Starts to Clarify Section 325(e)(2) Estoppel

In Olaplex, Inc. v L’Oréal USA, Inc. the Federal Circuit addressed, among other issues, PGR estoppel in subsequent district court litigation. Here, the Court addressed the timing to raise estoppel regarding written...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

Mintz - Intellectual Property Viewpoints

Good News/Bad News: Patent Owners and Petitioners Both Make Gains in CAFC Uniloc Decision

The Federal Circuit’s recent Uniloc 2017 v. Facebook Inc. decision is a mixed bag of good and bad news for both patent owners and inter partes review petitioners. On the plus side for patent owners (but not for petitioners),...more

Morrison & Foerster LLP - Federal Circuitry

Last Week in the Federal Circuit (March 8-12): The NeverEnding Story of the AIA’s No-Appeal Bar

Wow—it was a busy week at the Court last week. Lots of opinions, and lots of precedential ones. There were lots of good choices out there, so we sort of threw a dart at a board to see which one to write about. In the end,...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

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