Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6444865 | Process wherein a hydrocarbon feedstock is contacted with a catalyst | Guy Barre | 2002-09-03 |
| 5554307 | Process for improving lubricating base oil quality | Daniel Dagorn, Pierre Grandvallet, Bob Scheffer | 1996-09-10 |