News & Analysis as of

Patent Ownership Prior Art Estoppel

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

What Should the USPTO Consider Changing for Implementing Post-Final Written Decision Estoppel in Ex Parte Reexamination Based on...

The estoppel provision of 35 U.S.C. § 315(e)(1) had largely prevented requesters from challenging claims of a patent via ex parte reexamination after an inter partes review (IPR) that resulted in a final written decision...more

Jones Day

Reverse Engineered Search Insufficient For IPR/PGR Estoppel

Jones Day on

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

Snell & Wilmer

Federal Circuit Holds Patent Owners Bear IPR Estoppel Burden of Proof

Snell & Wilmer on

The Federal Circuit recently held, for the first time, that patent owners bear the burden of proof for an Inter Partes Review (“IPR”) Estoppel affirmative defense that an alleged infringer failed to include prior art in a...more

Fitch, Even, Tabin & Flannery LLP

Federal Circuit Addresses Burden of Proof for IPR Estoppel

On April 3, in Ironburg Inventions Ltd. v. Valve Corp., the Federal Circuit articulated a standard for applying inter partes review (IPR) estoppel on grounds a petitioner “reasonably could have raised” under 35 U.S.C. §...more

Vinson & Elkins LLP

Stopping Holes in Your IPR Estoppel Arguments

Vinson & Elkins LLP on

On April 3, 2023, in Ironburg Inventions Ltd. v. Valve Corp., Nos. 21-2296, 21-2297, 22-1070 (Fed. Cir. Apr. 3, 2023), the Federal Circuit for the first time defined the standard for determining the scope of estoppel set...more

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

2019 Report: Federal Circuit Appeals from the PTAB - Summaries of Key 2018 Decisions

In 2018, the U.S. Court of Appeals for the Federal Circuit docketed close to 600 appeals from the U.S. Patent and Trademark Office (USPTO). That is the second highest number since starting to hear post-American Invents Act...more

Morgan Lewis

2017 PTAB Digest: The Latest Trends and Developments in Post-Grant Proceedings

Morgan Lewis on

Recent patent reform legislation, rule changes, and court rulings are expected to have a significant impact on the strategies of both patent owners and petitioners....more

Knobbe Martens

Federal Circuit Review | October 2016

Knobbe Martens on

Withdrawal of Claims During Prosecution Can Trigger Prosecution History Estoppel In UCB, Inc. v. Yeda Research and Development Co., Ltd., Appeal No. 2015-1957, the Federal Circuit held that prosecution estoppel can apply even...more

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