Sou Hu Cai Jing·2026-01-13 06:00Group 1 - The State Intellectual Property Office of China has granted a patent for a "dense phase conveying device and method for powder catalysts" to China National Petroleum Corporation, China National Offshore Oil Corporation, and China Petroleum East Design Institute [1] - China National Petroleum Corporation, established in 1990, is primarily engaged in oil and gas extraction, with a registered capital of 48.69 billion RMB. The company has invested in 107 enterprises and participated in 5,000 bidding projects, holding 1,444 trademark records and 5,000 patent records [1] - China National Offshore Oil Corporation, founded in 1992, focuses on construction and installation, with a registered capital of approximately 1.48 billion RMB. The company has invested in 19 enterprises and participated in 5,000 bidding projects, holding 13 trademark records and 927 patent records [1] Group 2 - China Petroleum East Design Institute, established in 2016, specializes in professional technical services with a registered capital of 300 million RMB. The institute has participated in 1,238 bidding projects and holds 327 patent records [2] - The institute also possesses 19 administrative licenses [2]