ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,601, issued on May 6, was assigned to HRL Laboratories LLC (Malibu, Calif.).
"Closed-loop thermoplastic copolymers" was invented by Ashley Dustin (Santa Monica, Calif.), Andrew Nowak (Los Angeles) and Erik Crenshaw (Los Angeles).
According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosed technology provides a thermoplastic copolymer comprising: a plurality of difunctional triketone species; (b) a plurality of a first diamine species, wherein the first diamine species contains one or more primary amine groups and/or one or more secondary amine groups, and wherein the first diamine species does not contain a tertiary amine group; a plurality of a seco...