HJ

Hongfei Ji

CP China National Petroleum: 1 patents #32 of 93Top 35%
CL Cnpc Engineering Technology R&D Company Limited: 1 patents #18 of 40Top 45%
Overall (2025): #366,923 of 469,880Top 80%
1
Patents 2025

Issued Patents 2025

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
12391861 Cement slurry system, preparation method therefor and use thereof Jianzhou Jin, Yuchao Guo, Hong Yue, Youcheng Zheng, Hua Zhang +20 more 2025-08-19