Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5618780 | Lubricating composition including an ester-use of the composition and well fluid including the composition | Jean-Francois Argillier, Annie Audibert, Pierre Marchand, Michel Janssen | 1997-04-08 |