Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10889745 | Plugging agent with temperature-resistant, salt-resistant and high-expansion for plugging large fractures and preparation method thereof | Wan Fen Pu, Wen Ge Hu, Hai Zhao, Long He, Dai Jun Du +8 more | 2021-01-12 |