ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,310, issued on Nov. 3, was assigned to Guizhou University (Guiyang City, China).

"Beneficiation method for high clay type low-grade manganese carbonate ore" was invented by Yun Tang (Guiyang City, China), Bo Wu (Guiyang City, China), Guanghua Nie (Guiyang City, China), Yong Yang (Guiyang City, China) and Zhengbin Deng (Guiyang City, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention discloses a beneficiation method for high clay type low-grade manganese carbonate ore. The method includes: first preparing a regulator, polyepoxysuccinic acid (PESA), into a solution; adding raw ore to a mill, where the raw ore is high clay type l...