Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11142676 | Methods for producing emulsifiers for oil-based drilling fluids | Phillip W. Hurd, John B. Hines, Roger Scott Johnson, David T. Mpofu, Anne M. Cothran | 2021-10-12 |
| 10435611 | Methods for producing emulsifiers for oil-based drilling fluids | Phillip W. Hurd, John B. Hines, Roger Scott Johnson, David T. Mpofu, Anne M. Cothran | 2019-10-08 |
| 10005947 | Modified hydrocarbon resins as fluid loss additives | Phillip W. Hurd | 2018-06-26 |
| 9868891 | Methods for producing emulsifiers for oil-based drilling fluids | Phillip W. Hurd, John B. Hines, Roger Scott Johnson, David T. Mpofu, Anne M. Cothran | 2018-01-16 |