US Patent Issued to Hainan Hailing Chemipharma on July 1 for "Refining method of midbody of latamoxef sodium" (Chinese Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,344,622, issued on July 1, was assigned to Hainan Hailing Chemipharma Corporation Ltd. (Haikou, China).

"Refining method of midbody of latamoxef sodium" was invented by Yifeng Lu (Haikou, China), Qin Cai (Haikou, China) and Xingyu Chen (Haikou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A refining method of a midbody of latamoxef sodium includes: dissolving 7Beta-amino-7Alpha-methoxy-3-(5-tetrazolyl)thiomethyl-1-oxa-3-cephem-4-carboxylic acid in dichloromethane, and then dividing into a dichloromethane layer and a water layer; extracting the dichloromethane layer, adding a NaHCO3 solution to stir, and remaining an organic layer after stratifica...