Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6682633 | Apparatus for cocurrent fractional distillation | Zhanping Xu | 2004-01-27 |
| 6479720 | Alkylaromatic process using efficient prefractionation | Dennis E. O'Brien, Zhanping Xu | 2002-11-12 |