Mealey's (November 19, 2018, 11:45 AM EST) -- WASHINGTON, D.C. — The Federal Circuit U.S. Court of Appeals on Nov. 14 unsealed a Nov. 5 ruling that a Delaware federal judge erred in deeming a plaintiff collaterally estopped from bringing a patent infringement action (ArcelorMittal and ArcelorMittal Atlantique et Lorraine v. AK Steel Corporation, No. 17-1637, Fed. Cir., 2018 U.S. App. LEXIS 32232)....