Federal Circuit Affirms Dismissal of Pro Se Inventor’s Patent Term Adjustment Challenge for Untimeliness

WISECODE Take

Many business owners assume patent term adjustment (PTA) errors can be challenged at any time, but the CAFC's decision on September 10, 2026, dispels this misconception. In Guymon v. Squires, the inventor of U.S. Patent No. 10,943,030 sought to increase his PTA from 1,525 to 2,327 days, but his case was dismissed for being just two days past the 180-day deadline. This demonstrates how procedural missteps can instantly void valuable rights, though Taiwanese companies using professional representatives are rarely affected. Intellectual Classic offers patent portfolio health check services to help businesses precisely manage official prosecution timelines. We suggest two actions: first, verify PTA days immediately upon receiving the notice of allowance; second, strictly adhere to court filing deadlines during disputes rather than attempting unfamiliar procedures. Procedural compliance precedes substantive rights; keeping to the timeline is key to preserving patent value.