Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5114597 | Method of making a drilling fluid containing carbon black in a dispersed state | Jerry Rayborn | 1992-05-19 |
| 5114598 | Method of making drilling fluid containing asphaltite in a dispersed state | Jerry Rayborn | 1992-05-19 |