Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8114957 | Process for preparing poly(trimethylene ether) glycol and copolymers thereof | Yanhui Niu | 2012-02-14 |
| 7714174 | Lower-color polytrimethylene ether glycol using hydride compounds | Yanhui Niu | 2010-05-11 |