INTERNATIONAL PATENT: CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, CNPC TUBULAR GOODS RESEARCH INSTITUTE, 中国石油集团工程材料研究院有限公司 FILES APPLICATION FOR "HIGH-ENTROPY ULTRAHIGH-TEMPERATURE CERAMIC MATERIAL AND PREPARATION METHOD THEREFOR"

GENEVA, March 23 -- CHINA NATIONAL PETROLEUM CORPORATION (9 Dongzhimen North Street,Dongcheng District, Beijing 100007), 中国石油天然气集团有限公司 (中国北京市东城区东直门北大街9号), CNPC TUBULAR GOODS RESEARCH INSTITUTE (32 Dianzi Er Road, Yanta DistrictXi'an, Shaanxi 710077), 中国石油集团工程材料研究院有限公司 (中国陕西省西安市雁塔区电子二路32号) filed a patent application (PCT/C...