Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10774256 | Star-shaped polyacrylamide copolymer and preparation method thereof and drilling fluid including the copolymer | Zhihua Luo, Xuesong Xing, Yu Wang, Bairu Xia, Ziming Wang | 2020-09-15 |
| 7323434 | Electropositive production well treating fluid and method of preparing the same | Changming Su, Rushan Liu, Weiping Xu, Zengchen Guan, Xiushan Liu +5 more | 2008-01-29 |