ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,175, issued on June 17, was assigned to SK Chemicals Co. Ltd. (Gyeonggi-do, South Korea).
"Polyester film and preparation method thereof" was invented by Da-Young Hwang (Gyeonggi-do, South Korea) and Yoo Jin Lee (Gyeonggi-do, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a polyester film and a preparation method of the same. Since the polyester film includes a resin layer formed from a mixture comprising a polyester resin, which includes a first diol moiety derived from isosorbide and a second diol moiety derived from cyclohexanedimethanol in a controlled ratio, and polyethylene terephthalate in a speci...