ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,479,963, issued on Nov. 25, was assigned to SHANGHAI JIAO TONG UNIVERSITY (Shanghai).

"Preparation method and application of porous hydrogel adsorbent based on Radix Astragali residue" was invented by Jinming Luo (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a preparation method of a porous hydrogel adsorbent based on Radix astragali residues, including the following steps: subjecting residues of Chinese herbal medicine Radix astragali as a precursor to bleaching with NaClO2, alkaline washing with KOH, and high power ultrasonic treatment, thereby obtaining a precursor solution of uniformly dispersed cellulose n...