ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,603, issued on June 23, was assigned to TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION Co. LTD (Lanzhou, China).

"System and method for improving water quality of dehydration tower in purified terephthalic acid device" was invented by Xu Zhao (Lanzhou, China), Yongpeng Tan (Lanzhou, China), Yan Gao (Lanzhou, China), Kaixuan Ma (Lanzhou, China), Yipeng Zhang (Lanzhou, China), Yuanrui Lu (Lanzhou, China), Xiangnan Zhai (Lanzhou, China), Tao Zhou (Lanzhou, China) and Xiaoling Xie (Lanzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system and method for improving the water quality of a dehydration tower in a purified terephthalic ac...