Oil & Gas
| Mon 21 Sep 2026
Beijing, Sept. 21 -- PetroChina has sought patent for Preparation Method of Petg Copolyester. This invention was developed by Lin Yanyan, Li Zhenzhong, Li Zhiyu, Zhu Shifeng, Chen Chen, Chen Ying, Guan Shuhan, Huang Wenguang, Xu Jin, Liu Yumin, Ma Chenghua, Bian Fenglong, Xia Xiuli and Xu Zhe.
The patent application number is C..