Hyatt v. Stewart (Fed. Cir., August 29, 2025) 2018-2390, -2391, -2392, 2019-1038, -1039, -1049, -1070, 2024-1992, -1993, -1994, -1995

This judicial opinion from the United States Court of Appeals for the Federal Circuit details the ongoing litigation in the case of Gilbert P. Hyatt v. Coke Morgan Stewart, focusing on patent applications filed by Hyatt in the 1990s. The court addresses Hyatt's appeals concerning the affirmative defense of prosecution laches asserted by the United States Patent and Trademark Office (PTO), and Hyatt's cross-appeals regarding the district court's lack of Article III jurisdiction over certain claims. The court affirms the district court's judgment in favor of the PTO on the prosecution laches defense, finding that Hyatt engaged in unreasonable and unexplainable delay in prosecuting his applications. It also upholds the district court's determination that it lacked Article III jurisdiction over claims where the Board of Patent Appeals and Interferences had reversed examiner rejections, as Hyatt failed to demonstrate sufficient injury or dissatisfaction with these favorable decisions.

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