Sou Hu Cai Jing·2026-01-23 13:27Group 1 - The State Intellectual Property Office of China has granted a patent to China National Petroleum Corporation for a micro-crosslinked interlocking water loss reducer and its preparation method, with the announcement number CN119798535B and application date of November 2024 [1] - China National Petroleum Corporation, established in 1990 and based in Beijing, primarily engages in oil and gas extraction, with a registered capital of 48.69 billion RMB [1] - The company has made investments in 107 enterprises, participated in 5,000 bidding projects, and holds 1,440 trademark records and 5,000 patent records, along with 28 administrative licenses [1] Group 2 - China National Petroleum Engineering Technology Research Institute Co., Ltd., established in 2006 and located in Beijing, focuses on research and experimental development, with a registered capital of approximately 570.39 million RMB [1] - The institute has invested in 4 enterprises, participated in 580 bidding projects, and holds 33 trademark records and 2,227 patent records, along with 8 administrative licenses [1]