ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,765, issued on June 10, was assigned to TRINSEO EUROPE GMBH (Horgen, Switzerland).

"Hydrophobic high heat optical acrylic copolymers" was invented by Jiaxin J. Ge (Lower Providence, Pa.), Sri R. Seshadri (Holland, Pa.) and Gary A. Hall (Oaklyn, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to acrylic copolymers and terpolymers incorporating high Tg, hydrophobic (meth)acrylates that have high thermal stability and excellent optical properties. These copolymers are optically clear, and provide a copolymer having a Tg of 115-140 C, along with sufficiently high molecular weight. The copolymer is found to exhibit high heat res...