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Federal Circuit IP Blog

Federal Circuit Affirms Indefiniteness of the Term “About” Federal Circuit Affirms Indefiniteness of the Term “About”

June 10, 2026

At the PTAB Blog

Consistency Is Key – USPTO Issues Three New Informative Decisions Consistency Is Key – USPTO Issues Three New Informative Decisions

May 29, 2026

Federal Circuit IP Blog

Federal Circuit Affirms Finding that “Best” or “Optimal” Language in Claims Is Indefinite Federal Circuit Affirms Finding that “Best” or “Optimal” Language in Claims Is Indefinite

January 14, 2026

Federal Circuit IP Blog

Federal Circuit “Corrects” Antecedent Basis, Reversing District Court’s Indefiniteness Ruling Federal Circuit “Corrects” Antecedent Basis, Reversing District Court’s Indefiniteness Ruling

December 19, 2025

Federal Circuit IP Blog

Spotlight on Upcoming Oral Arguments – August 2025 Spotlight on Upcoming Oral Arguments – August 2025

August 4, 2025

Articles

Southeast Litigation Update: May 2024

Southeast Litigation Update: May 2024 Southeast Litigation Update: May 2024

July 3, 2024

Prosecution First Blog

The Eastern District of Arkansas Holds Key Claim Terms Indefinite in Enviro Tech. v. Safe Foods Corp. The Eastern District of Arkansas Holds Key Claim Terms Indefinite in Enviro Tech. v. Safe Foods Corp.

March 3, 2023

Prosecution First Blog

Federal Circuit Clarifies the Standard of Review for Invalidity Challenges Federal Circuit Clarifies the Standard of Review for Invalidity Challenges

January 13, 2023

News

6 results

Commentary

PTAB to Use District Court Standard for Indefiniteness PTAB to Use District Court Standard for Indefiniteness

January 6, 2021

Bloomberg Law

Commentary

USPTO Aligns AIA Review Indefiniteness Test with Courts USPTO Aligns AIA Review Indefiniteness Test with Courts

January 6, 2021

Law360

Commentary

5 Takeaways from the Ban on IPR Indefiniteness Rulings 5 Takeaways from the Ban on IPR Indefiniteness Rulings

February 12, 2020

Law360

Media Mention

Sprint Patents Ruled Valid in Cox Communications Fight Sprint Patents Ruled Valid in Cox Communications Fight

September 23, 2016

Reuters

Media Mention

Nautilus Dooms Dow's $30M Award in IP Row, Fed. Circ. Rules Nautilus Dooms Dow's $30M Award in IP Row, Fed. Circ. Rules

August 28, 2015

Law360

Media Mention

Verizon Prevails as Judge Axes Spherix Patent Under Nautilus Verizon Prevails as Judge Axes Spherix Patent Under Nautilus

July 2, 2015

Law360