Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8137565 | Naphthenic acid removal and conversion | Jianhua Yao | 2012-03-20 |
| 7947182 | Naphthenic acid removal process | — | 2011-05-24 |
| 6788414 | Method of analyzing multiple sample simultaneously by detecting absorption and systems for use in such a method | Edward S. Yeung | 2004-09-07 |