ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,441,675, issued on Oct. 14, was assigned to SK CHEMICALS Co. LTD. (Gyeonggi-do, South Korea).
"Method for preparing terephthalic acid, and terephthalic acid prepared therefrom" was invented by Yu-Mi Chang (Gyeonggi-do, South Korea), Ju-Sik Kang (Gyeonggi-do, South Korea), Jeong Ho Park (Gyeonggi-do, South Korea) and Hee-Il Chae (Gyeonggi-do, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a method for preparing terephthalic acid, and terephthalic acid prepared therefrom. Specifically, according to one embodiment of the present invention, by including the step of hydrolyzing a compound prepared by depolymerizin...