Issued Patents 2017
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9845421 | Encapsulating agent and preparing method thereof, and drilling fluid for petroleum drilling | Zhengsong Qiu, Xin Zhao, Hanyi ZHONG, Yongjun Zhang, Guowe Zhou | 2017-12-19 |