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Patent Litigation Intellectual Property Protection Estoppel

Jones Day

PTAB Claim Construction May Be Binding In Later Litigation

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In 2016, the Federal Circuit expressed doubt that claim constructions from the PTAB could give rise to estoppel in later litigation because “the [PTAB] applies the broadest reasonable construction of the claims while the...more

Jones Day

Federal Circuit Clarifies Scope of Patent Owner Estoppel

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The Federal Circuit recently issued a decision in SoftView LLC v. Apple Inc. clarifying the scope of patent owner estoppel set forth in 37 C.F.R. § 42.73(d)(3)(i). 2024 WL 3543902 (Fed. Cir. July 26, 2024). The regulation...more

A&O Shearman

Federal Circuit Provides Guidance On Estoppel Provision Under 37 C.F.R. § 42.73(d)(3)(i)

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On July 26, 2024, the Court of Appeals for the Federal Circuit (“CAFC”) issued a precedential opinion reversing-in-part decisions from the U.S. Patent Trial and Appeal Board (“PTAB”) in two inter partes reexamination...more

Jones Day

IPR Estoppel in Action

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Recently, District Court Judge Thomas S. Zilly in the Western District of Washington granted Ironburg Inventions Ltd.’s (“Ironburg”) motion for inter partes review (“IPR”) estoppelpursuant to 35 U.S.C. § 315(e)(2), which...more

McDermott Will & Emery

Same Product in Different Packaging May Constitute Separate Market for Antitrust Purposes

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Addressing an issue of first impression, the US Court of Appeals for the Second Circuit concluded that two medications that contain the same ingredients but are packaged in different forms constitute separate markets for...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

Reverse Engineered Search Insufficient For IPR/PGR Estoppel

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In GeigTech East Bay v. Lutron Electronics, patent owner GeigTech argued that Lutron should be estopped under 35 U.S.C. § 325(e)(2) from asserting two prior art grounds that it said Lutron could have reasonably raised in its...more

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

[Webinar] Developments in IPR Estoppel - December 5th, 1:00 pm - 2:00 pm EST

Director Jason A. Fitzsimmons and Counsel Richard A. Crudo will present the “Developments in IPR Estoppel” webinar on Tuesday, December 5, 2023, at 1:00 PM ET. The possibility of being estopped from asserting prior art in...more

Proskauer - Minding Your Business

Scope of Issued Patents May be Limited by Prosecution Estoppel Created in Child Cases

Cell therapy products in the U.S. are estimated to be worth approximately $4.5 billion currently and expected to grow to over $30 billion in the next ten years. As market value increases litigation is bound to heat up....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

Akin Gump Strauss Hauer & Feld LLP

IPR Estoppel Does Not Prohibit ‘Cumulative or Duplicative’ System-Based Invalidity Defenses in District Court Actions

In a decision denying summary judgment, the District of Massachusetts weighed in on an unsettled issue: whether after receiving a final written decision in an inter partes review, a patent challenger is permitted to raise...more

Akin Gump Strauss Hauer & Feld LLP

Federal Circuit: Burden of Proof in IPR Estoppel Rests with Patentee, Not Accused Infringer

In an appeal from the United States District Court for the Western District of Washington, the Federal Circuit confirmed that on the issue of inter partes review (IPR) estoppel, the burden of proof rests on the patentee to...more

Knobbe Martens

Federal Circuit Review - April 2023

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Who Bears the Burden of Proof for IPR Estoppel? In Ironburg Inventions Ltd. v. Valve Corp., Appeal No. 21-2296, the Federal Circuit held that the patentee has the burden of proving that invalidity grounds not raised in a...more

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

PTAB Strategies and Insights Newsletter - May 2023: Beware of Collateral Estoppel at the PTAB

When thinking about estoppel and the PTAB, the § 315(e) estoppels—relating to grounds a petitioner raised or reasonably could have raised—are likely the first to come to mind. However, other types of estoppel, such as...more

Kilpatrick

PTAB Alert: Estoppel and the “Skilled Searcher” Standard

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Yesterday, in Ironburg Inventions Ltd. v. Valve Corp., Case No. 21-2296 (Fed. Cir. Apr. 3, 2023), the Federal Circuit held that for estoppel to apply under 35 U.S.C. § 315(e)(2), a patent holder must prove, by a preponderance...more

Knobbe Martens

Who Bears the Burden of Proof for IPR Estoppel?

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IRONBURG INVENTIONS LTD. v. VALVE CORP. Before Lourie, Clevenger, and Stark.  Appeal from the United States District Court for the Western District of Washington. Summary: The patentee has the burden of proving that...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: California Institute of Technology v. Broadcom...

Caltech sued Broadcom and Apple for infringement, asserting three of its data transmission patents against Broadcom’s WiFi chips and certain Apple products that incorporate those chips. Apple then filed IPR petitions...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

McDermott Will & Emery

[Ongoing Program] PTAB Session: Strategic Considerations Before Filing IPR Petitions - April 21st, 10:00 am - 11:00 am JST

We are committed to providing insightful commentary on IP developments from around the world to our Japanese clients. In light of that effort, we are continuing our free monthly webinar series, McDermott IP Focus. During...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

Knobbe Martens

IPR estoppel “under an unusual set of facts”

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Before Stoll, Schall, and Cunningham. Appeal from the United States District Court for the Western District of Texas....more

McDonnell Boehnen Hulbert & Berghoff LLP

Hologic, Inc. v. Minerva Surgical, Inc. (Fed. Cir. 2022)

Last year, the Supreme Court declined an invitation to abrogate the doctrine of assignor estoppel by an assignor sued for patent infringement in Minerva Surgical v. Hologic.  Nevertheless, the Court followed its proclivities...more

Jones Day

Coordinate Arguments To Avoid Procedural Bars

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In a recent decision, 25 F.4th 1035 (Fed. Cir. 2022), the Federal Circuit dismissed for lack of jurisdiction an appeal of the PTAB’s decision that estopped a Petitioner from maintaining a third IPR that challenged the same...more

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

[Webinar] The Interplay Between District Court and PTAB: Estoppels, Evidentiary, Recovery - April 5th, 1:00 pm - 2:00 pm EDT

In conjunction with the release of the firm's year-in-review report, our speakers will discuss the recent cases surrounding IPR estoppels, evidentiary issues, and recovery, which notably highlight the interplay between the...more

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