US Patent Issued to LG CHEM on Feb. 17 for "Polyimide-based polymer film, substrate for display device, and optical device using the same" (South Korean Inventors)

ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,552,934, issued on Feb. 17, was assigned to LG CHEM Ltd. (Seoul, South Korea).

"Polyimide-based polymer film, substrate for display device, and optical device using the same" was invented by Min Wook Lee (Daejeon, South Korea), Kyunghwan Kim (Daejeon, South Korea) and Chan Hyo Park (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a polyimide-based polymer film comprising a polyimide-based polymer containing a polyimide repeating unit synthesized by the reaction of an acid anhydride compound having a specific structure and a diamine compound, wherein a glass transition temperature is 400deg C. or more...