ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,347, issued on Sept. 23, was assigned to TAIWAN TEXTILE RESEARCH INSTITUTE (New Taipei, Taiwan).
"Manufacturing method of zwitterionic resin" was invented by Chen-Shou Hsu (New Taipei, Taiwan), Sun-Wen Juan (New Taipei, Taiwan) and Chun-Hung Lin (New Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A zwitterionic resin is manufactured by a manufacturing method which includes the following steps. A first thermal process is performed on a first crosslinking agent and a choline having hydroxyl group or amino group to form a first mixture, in which the first crosslinking agent includes an isocyanate group. A second thermal process is perfo...