Issued Patents 2019
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10266617 | Cationic copolymer and use thereof in lost circulation additive | Changming Su, Mengyun Zhao, Jianzheng Su, Rusheng Zhang, Suobing Zhang +3 more | 2019-04-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10266617 | Cationic copolymer and use thereof in lost circulation additive | Changming Su, Mengyun Zhao, Jianzheng Su, Rusheng Zhang, Suobing Zhang +3 more | 2019-04-23 |