ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,131, issued on Sept. 23, was assigned to Jinggangshan University (Ji 'an, China).
"Preparation method for spherical Zn-Mn metal compound" was invented by Wenming Liao (Ji 'an, China), Haihui Chen (Ji 'an, China), Junyue Lin (Ji 'an, China), Xiaobing Liu (Ji 'an, China), Renyun Kuang (Ji 'an, China) and Tingting Ma (Ji 'an, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention discloses a preparation method for a spherical Zn-Mn metal compound. The preparation method comprises the following steps: adding a metal ion solution to a weak acid carbon dot solution; and then, adding a sodium carbonate solution to the above solution at...