US Patent Issued to ASYMCHEM LABORATORIES (TIANJIN) on May 20 for "Continuous post-treatment method and device for penem compound" (Chinese, American Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,303,805, issued on May 20, was assigned to ASYMCHEM LABORATORIES (TIANJIN) Co. LTD. (Tianjin, China).

"Continuous post-treatment method and device for penem compound" was invented by Hao Hong (Morrisville, N.C.), Liang Hong (Tianjin, China), Jian Tao (Tianjin, China), Jinhai Guo (Tianjin, China), Xian Cheng (Tianjin, China) and Yan Zhang (Tianjin, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a continuous post-treatment method and device for a penem compound. The method includes the following steps: S1, performing continuous extraction on a reaction crude product of a penem compound, to obtain an extraction heavy phase and an extract...