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Patent Litigation Estoppel Patent-in-Suit

Jones Day

IPR Estoppel in Action

Jones Day on

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

Patterson Belknap Webb & Tyler LLP

Judge McMahon Rejects Estoppel Argument Based on Lack of Reasonableness and Diligence in Prior Art Searching

On December 21, 2023, Judge McMahon (S.D.N.Y.) denied GeigTech East Bay LLC’s (“GeigTech”) motion to preclude Lutron Electronics Co. (“Lutron”) from raising an affirmative defense of invalidity based on 35 U.S.C. § 325(e)(2),...more

Goldberg Segalla

Federal Circuit Clarifies IPR Estoppel and Vacates $1.1 Billion Verdict in Favor of Caltech Due to Improper Damages Theory

Goldberg Segalla on

On February 4, 2022, the Federal Circuit clarified that IPR estoppel extends to all claims and invalidity grounds that the petitioner could have reasonably asserted in its IPR petition. ...more

Jones Day

Combatting Lack of Assignor Estoppel in IPRs (Maybe)

Jones Day on

Assignor estoppel is an equitable doctrine that prevents a party who assigns a patent to another from later challenging the validity of the assigned patent. As reported in a prior post, the Federal Circuit recently stated...more

Morris James LLP

Court Declines To Vacate No Willfulness Opinion And Laches/Estoppel Trial Is Scheduled

Morris James LLP on

Stark, C.J. Plaintiff’s motion to vacate summary judgment of no willfulness is denied. Additional issues addressed in a status letter are resolved. A jury trial was held January 11-26, 2016. The court previously, based...more

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