Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887671 | Fracturing with a mixture of carbon dioxide and alcohol | — | 1989-12-19 |
| 4800957 | Recovering hydrocarbons with a mixture of carbon dioxide and alcohol | Jeffrey T. Hawkins | 1989-01-31 |