A new inter partes review petition has been filed at the Patent Trial and Appeal Board in IPR2026-00406, a proceeding captioned Duke Manufacturing Co. and opened on July 2, 2026. For patent practitioners tracking competitive challenges in the foodservice and commercial equipment space, this is a case worth watching as the record develops.

At this early stage, the PTAB docket indicates the filing of the IPR but may not yet reflect a fully developed public record identifying all details practitioners typically want immediately, including the specific patent claims challenged, the named petitioner and patent owner in full, and the precise prior-art combinations asserted in the petition.