INTERNATIONAL PATENT: PETROCHINA SHANGHAI ADVANCED MATERIALS RESEARCH INSTITUTE CO. LTD, 中石油（上海）新材料研究院有限公司, PETROCHINA COMPANY LIMITED, 中国石油天然气股份有限公司 FILES APPLICATION FOR "PERFLUOROPOLYETHER-MODIFIED SILICON DIOXIDE MATERIAL AND PREPARATION METHOD THEREFOR"

GENEVA, June 1 -- PETROCHINA SHANGHAI ADVANCED MATERIALS RESEARCH INSTITUTE CO. LTD (Digital Mansion, No.1, Shengang Avenue, Pudong New AreaShanghai 201303), 中石油（上海）新材料研究院有限公司 (中国上海市浦东新区中国（上海）自由贸易试验区临港新片区申港大道1号406室), PETROCHINA COMPANY LIMITED (9 Dongzhimen North Street, Dongcheng DistrictBeijing 100007), 中国石油天然气股份有限Ð...