Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5355954 | Utilizing drilling fluid in well cementing operations | David D. Onan, Bobby G. Brake | 1994-10-18 |
| 5332041 | Set-activated cementitious compositions and methods | David D. Onan, Wendell D. Riley | 1994-07-26 |
| 5327968 | Utilizing drilling fluid in well cementing operations | David D. Onan, Patty L. Totten, Bobby G. Brake, Bobby J. King | 1994-07-12 |
| 5295543 | Converting drilling fluids to cementitious compositions | David D. Onan, Patty L. Totten, Bobby J. King | 1994-03-22 |