ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,199, issued on May 13, was assigned to Purdue Pharma LP (Stamford, Conn.).
"Morphinan derivatives and use thereof" was invented by Laykea Tafesse (Robbinsville, N.J.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The application is directed to compounds of formula (I): and pharmaceutically acceptable salts, radiolabeled isomers, solvates, or hydrates thereof, wherein R1, R2, R3, X, and n are defined as set forth in the specification. The application is also directed to compounds of formulae II, I-a, I-a1, I-a2, I-b, and I-b1 and the pharmaceutically acceptable salts, radiolabeled isomers, solvates, and hydrates thereof. The application is also direc...