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 "BLOCK POLYIMIDE RESIN AND PREPARATION METHOD THEREFOR AND USE THEREOF"

GENEVA, May 9 -- PETROCHINA SHANGHAI ADVANCED MATERIALS RESEARCH INSTITUTE CO. LTD. (Room 406, No. 1 Shengang Avenue, Lingang New Area, China (Shanghai) Pilot Free Trade ZonePudong New Area, Shanghai 201306), 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 District, Beijing 100007), 中国石油天&...