ALEXANDRIA, Va., April 9 -- United States Patent no. 12,269,838, issued on April 8, was assigned to GREEN VALLEY (SHANGHAI) PHARMACEUTICALS Co. LTD. (Shanghai) and SHANGHAI INSTITUTE OF MATERIA MEDICA, CHINESE ACADEMY OF SCIENCES (Shanghai).

"Composition of mannuronic diacid" was invented by Meiyu Geng (Shanghai), Jian Ding (Shanghai), Zhenqing Zhang (Suzhou, China), Zhongping Xiao (Shanghai), Xiaoguang Du (Shanghai) and Xianliang Xin (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a mannuronic diacid oligosaccharide composition, comprising a mannuronic diacid of Formula (III) or a pharmaceutically acceptable salt thereof, wherein n is an integer from 1 to 9, m is 0,...