Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848464 | Method to improve use of polymers for injectivity profile control in enhanced oil recovery | Alfred R. Jennings, Jr. | 1989-07-18 |
| 4809781 | Method for selectively plugging highly permeable zones in a subterranean formation | — | 1989-03-07 |