'Cooling' Chewing Gum Patent Invalid As Obvious, Federal Circuit Affirms

'Cooling' Chewing Gum Patent Invalid As Obvious, Federal Circuit Affirms

WASHINGTON, D.C. - An Illinois federal judge did not err in deeming invalid a patented combination of N-2,3-trimethyl-2-isopropyl butanamide (WS-23) and menthol for "cooling" chewing gum, a divided Federal Circuit U.S. Court of Appeals ruled ...read more