Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4347116 | Two-stage coal liquefaction | Darrell D. Whitehurst, Thomas O. Mitchell | 1982-08-31 |
| 4329221 | Upgrading of hydrocarbon feedstock | Thomas O. Mitchell, Darrell D. Whitehurst | 1982-05-11 |
| 4317712 | Conversion of heavy petroleum oils | — | 1982-03-02 |