ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,159, issued on June 17, was assigned to Exxon Mobil Chemical Patents Inc. (Baytown, Texas) and Regents of the University of Minnesota (Minneapolis).

"Polyesters and polyketoesters from carbonylative terpolymerization of enols, methods to produce, blends, and articles therefrom" was invented by Ian Tonks (Minneapolis) and Alex Edward Carpenter (Seabrook, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "This invention relates to a polymerization process for producing a polyketoester, or an olefin-polyketoester utilizing a hydroesterification catalyst and an olefin-CO copolymerization catalyst in a reaction medium. Polyketoester copolymers and olef...