Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9593290 | Lubricating oil composition and production thereof | Xin-Ying Xie, Zuoxin Huang, Qinghua Duan, Zhiqiang Wu, Lihua Wang | 2017-03-14 |
| 9587198 | Mannich base, production and use thereof | Qinghua Duan, Zuoxin Huang | 2017-03-07 |