Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822501 | Use of lignin/amine/surfactant blends in enhanced oil recovery | Francis E. Debons, Larry D. Pedersen | 1989-04-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822501 | Use of lignin/amine/surfactant blends in enhanced oil recovery | Francis E. Debons, Larry D. Pedersen | 1989-04-18 |