US Patent Issued to CHINA PETROLEUM & CHEMICAL, SINOPEC OILFIELD SERVICE, SINOPEC SHENGLI PETROLEUM ENGINEERING, DRILLING TECHNOLOGY RESEARCH INSTITUTE OF SINOPEC SHENGLI PETROLEUM ENGINEERING on May 6 for "Coated rubber particle, its preparation and application thereof" (Chinese Inventors)

ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,668, issued on May 6, was assigned to CHINA PETROLEUM & CHEMICAL Corp. (Beijing), SINOPEC OILFIELD SERVICE Corp. (Beijing), SINOPEC SHENGLI PETROLEUM ENGINEERING Co. LTD (Shandong, China) and DRILLING TECHNOLOGY RESEARCH INSTITUTE OF SINOPEC SHENGLI PETROLEUM ENGINEERING Co. LTD (Shandong, China).

"Coated rubber particle, its preparation and application thereof" was invented by Gongrang Li (Shandong, China), Wenbo Li (Beijing), Bingxiang Sun (Beijing), Hui Tian (Shandong, China), Xizhou Wang (Beijing), Ke Li (Shandong, China), Jianghong Jia (Shandong, China), Lei Yu (Shandong, China), Jie Sun (Shandong, China), Xudong Wang (Shandong, China), Chengjun Wang (Shandong, China), Bingta...