ALEXANDRIA, Va., May 19 -- United States Patent no. 12,629,697, issued on May 19, was assigned to INSTITUTE OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES, CAGS (Chengdu, China).

"Ore dressing process for medium-grade and low-grade mixed collophanite" was invented by Shanzhi Deng (Chengdu, China), Jie Deng (Chengdu, China), Xinhua Zhang (Chengdu, China), Da Chen (Chengdu, China), Shiqiang Yan (Chengdu, China) and Jun Song (Chengdu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An ore dressing process for medium-grade and low-grade mixed collophanite includes the following steps: S1; crushing ores to obtain crushed ores; S2: screening the crushed ores to obtain fine-fraction ores and coarse-fraction ...