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Estoppel Patent Litigation Patent Infringement

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

WilmerHale

Federal Circuit Patent Watch: Ordering In-Person Appearance to Testify Regarding Potential Fraud on the Court is within Court's...

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Precedential and Key Federal Circuit Opinions - 1.  BACKERTOP LICENSING LLC [OPINION] (23-2367, 23-2368, 24-1016, 24-1017 Prost, Hughes, and Stoll) - Hughes, J. The Court affirmed the District Court’s orders (1)...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

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

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

AEON Law

Patent Poetry: The “Skilled Searcher” and IPR Estoppel

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The Federal Circuit has issued an opinion on the burden of proof for establishing estoppel in a case involving an inter partes review (IPR) petition. The case is Ironburg Inventions Ltd. v. Valve Corp....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

Fish & Richardson

Texas Patent Litigation Monthly Wrap-Up: April 2023

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Four subjects stood out in patent litigation in Texas in April 2023: (1) applicability of the customer-suit exception to the first-to-file rule; (2) the level of ties a reasonable royalty methodology must have to the facts of...more

WilmerHale

Federal Circuit Adopts “Skilled Searcher” Standard for IPR Estoppel

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On April 3, 2023, the Federal Circuit issued an opinion in Ironburg Inventions Ltd. v. Valve Corp., addressing the scope of what invalidity grounds are subject to estoppel pursuant to 35 U.S.C. § 315(e)(2) and the burden of...more

Locke Lord LLP

The Party Seeking IPR Estoppel Bears ‎the Burden to Prove Non-Petitioned Invalidity Grounds ‎‎Reasonably Could Have Been Raised

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In the April 3, 2023 decision in Ironburg Inventions Ltd. v. Valve Corporation, 21-2296, Doc. 66, the Federal Circuit provides crucial guidance regarding inter partes review (IPR) estoppel under 35 U.S.C. § 315(e)(2). In...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

McDermott Will & Emery

IPR Estoppel Applies to Claim Not Addressed During Pre-SAS Proceeding

In the companion district court case to the Supreme Court’s 2019 Thryv v. Click-to-Call decision regarding the scope of review for inter partes review (IPR) decisions, the US Court of Appeals for the Federal Circuit addressed...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

Morrison & Foerster LLP - Federal Circuitry

Last Week In The Federal Circuit (August 8 – August 12): Taking A Round Trip On The Assignor Estoppel Express

For most of us, we’re stuck in the August heat, on delayed European vacations, or hopefully just hanging out at the beach. But for the Court it still was work as usual, including a return trip to the Federal Circuit for the...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

The Board Declines To Apply Interference Estoppel

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On June 14, 2022, the Board instituted Zynga Inc.’s (“Zynga”) petition for IPR against U.S. Patent No. 7,168,089 (the “’089 patent”), rejecting Patent Owner IGT’s argument that interference estoppel should preclude...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

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