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

The U.S. Patent and Trademark Office is an agency of the United States Department of Commerce that serves a fundamental role in the U.S. intellectual property system by issuing patents and registering trademarks.... more +
The U.S. Patent and Trademark Office is an agency of the United States Department of Commerce that serves a fundamental role in the U.S. intellectual property system by issuing patents and registering trademarks.    less -
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

Schwabe, Williamson & Wyatt PC

Latest Federal Court Cases - April 2024 #3

Schwabe, Williamson & Wyatt PC on

Luv N’ Care, Ltd. v. Lindsey Laurain, Appeal Nos. 2022-1905, -1970 (Fed. Cir. Apr.12, 2024) - In this week’s Case of the Week, the Federal Circuit affirmed the district court’s bench trial decision that unclean hands...more

Knobbe Martens

Enforcing a Patent Known to be Invalid Can Trigger Attorneys’ Fees

Knobbe Martens on

ENERGY HEATING, LLC v. HEAT ON-THE-FLY, LLC - Before Moore, Prost, and Stoll.  Appeal from the U.S. District Court for the District of North Dakota. Summary: Enforcing a patent with knowledge that it is invalid can...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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