Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10150903 | Composition and use therof, oil-based drilling fluid and a method for raising shearing force of oil-based drilling fluid | Yongxue Lin, Zhoujun LI, Xiuzhen Han, Sheng Li, Xiaohua Yang +3 more | 2018-12-11 |
| 8623791 | Copolymer and preparation method and application thereof | Xiaohua Yang, Lin Wang, Jiafen Li, Xiaolin Qian, Sheng Li +5 more | 2014-01-07 |