ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,318, issued on June 24, was assigned to Novomer Inc. (Rochester, N.Y.).
"Polypropiolactones and methods of preparation" was invented by Christopher A. DeRosa (Rochester, N.Y.), Eric Stoutenburg (Rochester, N.Y.), Lisa B. Todd (Rochester, N.Y.) and Catherine A. Falkner (Rochester, N.Y.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are methods of efficiently making poly(3-hydroxypropionate) and related copolymers from beta propiolactone utilizing carboxylate salts of an onium cation. In another aspect, the present invention provides polymerization systems comprising combinations of initiators and monomers that together enable the efficient ...