Oil & Gas
| Wed 03 Dec 2025
Beijing, Dec. 3 -- State Intellectual Property Office of China has received PetroChina patent application for Self-cleaning Mass and Heat Transfer Filler and Device. Zhu Changjun, Tian Peng, Kang Ju, Fang Wei, Liao Faming, Zou Kai, Guan Jiangtao, Yin Zhipeng, Dou Xiaochao, Huang Kun, Yan Jianye, Kuang Feipeng, Wang Zhoulei, Hui ..