The U.S. Court of Appeals for the Federal Circuit (CAFC) on Monday in a precedential decision authored by Judge Lourie affirmed a district court’s ruling determining certain claims of Enviro Tech Chemical Services, Inc.’s patent for a method of poultry treatment indefinite. Enviro Tech’s U.S. Patent No.10,912,321is titled “Methods of Using Peracetic Acid to Treat Poultry in a Chill Tank During Processing.” Enviro Tech sued Safe Foods Corp. for infringement of a number of claims of the patent in the U.S. District Court for the Eastern District of Arkansas.

On April 30, the Office of the U.S. Trade Representative (USTR) released this year’s Special 301 Report, which surveys the effectiveness of intellectual property (IP) rights and enforcement abroad and identifies foreign nations where IP protections are uncertain or disregarded. The 2026 report marks the first time in 13 years that a Priority Foreign Country (PFC) has been named, with Vietnam being identified as a PFC for persistent failures to address several long-standing IP concerns. The USTR has also added the European Union (EU) to the Special 301 Report’s Watch List, the first time since 2006 that the continental government has been identified for IP-related concerns in addition to individual European nations.

The U.S. Patent and Trademark Office (USPTO) issued a significant Decision on Remand on Monday, April 27, 2026, clarifying when estoppel under 35 U.S.C. § 315(e)(1) attaches and—critically—what it means to “request” a proceeding “before the Office.” The ruling arises from an increasingly common set of circumstances—HID had initially filed an inter partes review (IPR) against CPC Patent Technologies’ U.S. Patent No. 9,665,705, and subsequently requested ex parte reexamination requests of that same patent. Monday’s decision clarifies that a party is estopped from “requesting” ex parte reexam at the moment the IPR final written decision issues when the USPTO has yet to order ex parte reexam.