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Patent Prosecution › Inequitable Conduct › United States Patent and Trademark Office

Wilson Sonsini Goodrich & Rosati

Inventor’s Failure to Provide Material Information to the USPTO Results in an Unenforceable Patent

Wilson Sonsini Goodrich & Rosati on

On August 20, 2025, the U.S. District Court for the District of Delaware (court) found inequitable conduct when Applicant, Lindis Biotech, GMBH (Lindis), relied on data from hastily performed experiments to obtain a patent...more

Knobbe Martens

Federal Circuit Review - September 2021

Knobbe Martens on

Arguments to the Patent Office That Contradict Information Submitted to the FDA Support an Inference of Deceptive Intent In Belcher Pharmaceuticals v. Hospira, Inc., Appeal No. 20-1799, the Federal Circuit held that a...more

Haug Partners LLP

Belcher Pharmaceuticals’ Patent Held Unenforceable by the Federal Circuit

Haug Partners LLP on

The Federal Circuit published a precedential decision on September 1, 2021 regarding the unenforceability of a pharmaceutical patent due to inequitable conduct. In Belcher Pharmaceuticals LLC v. Hospira, Inc., the Court...more

Foley & Lardner LLP

Federal Circuit Finds Regeneron Transgenic Mouse Patent Invalid For Inequitable Conduct With Intent Inferred From Litigation...

Foley & Lardner LLP on

In a 38 page decision with a 19 page dissent by Judge Newman, the Federal Circuit determined that Regeneron’s transgenic mouse patent is unenforceable due to inequitable conduct. The decision was rendered in Regeneron...more

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