( June 12, 2026, 9:57 AM EDT) -- WASHINGTON, D.C. — A Federal Circuit U.S. Court of Appeals panel held that a federal judge in Delaware was correct to find that a claim of a patent covering elements of OxyContin was invalid as obvious; the panel determined that substantial evidence showed that a person of ordinary skill would have been motivated to replace the nonscalable heating method disclosed in the prior art with a device called a coating pan and would have reasonably expected that approach to succeed....