Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863618 | Oil recovery with water containing carbonate salt, CO.sub.2, and surfactant | — | 1989-09-05 |
| 4856589 | Gas flooding with dilute surfactant solutions | Myron I. Kuhlman, John K. Borchardt | 1989-08-15 |