ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,371, issued on July 28, was assigned to TRONJEN MEDICAL TECHNOLOGY INC. (Taichung City, Taiwan).

"Hydrogel composition" was invented by Szu-Hsien Chen (Taichung City, Taiwan), Chiu-Fang Chen (Taichung City, Taiwan), Ya-Wen Ku (Taichung City, Taiwan) and Ren-Shian Wang (Taichung City, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is a hydrogel composition that includes a crosslinked collagen polymer, a carboxymethyl cellulose derivative, an aqueous sodium chloride solution, a humectant, and an antimicrobial agent. The crosslinked collagen polymer has collagen, a hydrophilic polyether, and a dicarbamate group linking the colla...