INTERNATIONAL PATENT: CHINA PETROLEUM & CHEMICAL CORPORATION, 中国石油化工股份有限公司, SINOPEC PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD, 中石化石油工程技术研究院有限公司 FILES APPLICATION FOR "POLYMER FLUID LOSS AGENT, PREPARATION METHOD THEREFOR AND USE THEREOF"

GENEVA, Nov. 10 -- CHINA PETROLEUM & CHEMICAL CORPORATION (No.22 Chaoyangmen North StreetChaoyang District, Beijing 100728), 中国石油化工股份有限公司 (中国北京市朝阳区朝阳门北大街22号), SINOPEC PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD (No.197 Baisha Road, Shahe CountyChangping District, Beijing 102206), 中石化石油工程技术研究院有限公司 (中国北京市昌平区沙河镇百沙路197号) filed a ...