ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,335, issued on April 7, was assigned to LG Chem Ltd. (Seoul, South Korea).

"Polycarbonate copolymer and method for preparing the same" was invented by Dayoung Lee (Daejeon, South Korea), Youngwook Son (Daejeon, South Korea) and Hyong Min Bahn (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a polycarbonate copolymer having improved surface hardness while maintaining impact strength. The polycarbonate copolymer including a specific ester repeating unit according to the present disclosure is characterized by having excellent surface hardness while maintaining intrinsic basic physical properties of polycarbonate."

The p...