GENEVA, May 26 -- PETROCHINA COMPANY LIMITED (9 Dongzhimen North StreetDongcheng District, Beijing 100007), 中国石油天然气股份有限公司 (中国北京市东城区东直门北大街9号) filed a patent application (PCT/CN2024/127622) for "PHOSPHORUS-FREE PRE-FILMING AGENT AND PREPARATION METHOD THEREFOR, AND PRE-FILMING METHOD FOR WATER-COOLED HEAT EXCHANGER" on Oct 28, 2024. With publication no. WO/2025/103113, the details related to the patent application was published on May 22, 2025.
Notably, the patent application was submitted under the International Patent Classification (IPC) system, ...