ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,345, issued on July 28, was assigned to HANWHA SOLUTIONS Corp. (Seoul, South Korea).
"Method for preparing a copolyester" was invented by Eung Gyu Kim (Daejeon, South Korea), Ho Seong Nam (Daejeon, South Korea), Kyoung Won Yim (Daejeon, South Korea) and Ju Mi Yun (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a method for preparing a copolyester. More specifically, the present disclosure relates to a method for preparing a copolyester that reduces the use of a cobalt-based coloring agent but minimizes yellowing, by using a specific thermal stabilizer."
The patent was filed on Aug. 11, 2021, un...