ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,882, issued on May 20, was assigned to HANGZHOU TONGZHOU BIOTECHNOLOGY Co. LTD. (Hangzhou, China).

"Pregabalin artificial hapten, artificial antigen and preparation method therefor and application thereof" was invented by Yueshui Shao (Zhejiang Province, China) and Zhen Wang (Zhejiang Province, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a pregabalin artificial hapten, artificial antigen and preparation method therefor and application thereof. The structure of the pregabalin artificial hapten is shown as formula (I) and structure of the pregabalin artificial antigen is shown as formula (II). The application is in the preparati...