Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5612294 | Scleroglucan based drilling mud | Alain Vaussard, Alain Donche | 1997-03-18 |
| 5525587 | Application of muds containing scleroglucan to drilling large diameter wells | Alain Donche | 1996-06-11 |