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Patent Infringement Laches Patent Applications

Morrison & Foerster LLP

Federal Circuit Pushes Back on Prosecution Laches

In October 2023, we reported on the district court decision in Sonos, Inc. v. Google LLC. The decision was notable for reviving the prosecution laches doctrine to render unenforceable a continuation patent filed 13 years...more

Bradley Arant Boult Cummings LLP

The Federal Circuit Calls for a Replay Allowing Sonos Another Opportunity at Google

The Federal Circuit’s recent decision in Google LLC v. Sonos, Inc. (24-1097) offers a compelling look at the evolving doctrine of prosecution laches, the written description requirement, and the practical realities of patent...more

Morrison & Foerster LLP

Sonos v. Google Breathes New Life into Prosecution Laches Doctrine

A recent district court decision in Sonos v. Google has set forth a novel application of the prosecution laches doctrine to a patent with a post-1995 priority date. Sonos Inc. v. Google LLC, 20-06754 WHA, 2023 WL 6542320...more

Knobbe Martens

Federal Circuit Review - June 2021

Knobbe Martens on

Bulk-Filed Patent Applications Claiming Distant Priority Trigger Prosecution Laches - In Hyatt v. Hirshfeld, Appeal No. 18-2390, the Federal Circuit held that the PTO met its burden to prove prosecution laches for bulk-filed...more

Fitch, Even, Tabin & Flannery LLP

Patent Applicants May Lose Rights by Causing Too Much Delay

On June 1, in Hyatt vs Hirshfeld, the Federal Circuit upheld the USPTO’s decision to reject a patent application for prosecution laches, based on delay by the applicant. The decision details behaviors that, while likely...more

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