Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7439209 | Drilling fluid systems with improved fluid loss properties | Billy G. Chesser, George W. Bettge | 2008-10-21 |
| 6403537 | Drilling fluid systems with improved fluid loss properties | Billy G. Chesser, George W. Bettge | 2002-06-11 |