Sou Hu Cai Jing·2026-01-09 02:36Group 1 - The State Intellectual Property Office of China has granted a patent for "Homogenized Polyacrylonitrile Filament and Its Preparation Method" to China Petroleum & Chemical Corporation and Sinopec Shanghai Petrochemical Company Limited, with the announcement number CN116065254B and application date in October 2021 [1] - China Petroleum & Chemical Corporation, established in 2000 and based in Beijing, primarily engages in oil and gas extraction, with a registered capital of 121,739.6893 million RMB. The company has invested in 268 enterprises, participated in 5,000 bidding projects, holds 45 trademark records, 5,000 patent records, and possesses 41 administrative licenses [1] - Sinopec Shanghai Petrochemical Company Limited, founded in 1993 and located in Shanghai, focuses on oil, coal, and other fuel processing industries, with a registered capital of 105,426.175 million RMB. The company has invested in 21 enterprises, participated in 5,000 bidding projects, holds 51 trademark records, 1,352 patent records, and has 12,791 administrative licenses [1]