Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5114599 | Use of lignin/amine/surfactant blends in enhanced oil recovery | Francis E. Debons, Lawrence E. Whittington | 1992-05-19 |
| 4822501 | Use of lignin/amine/surfactant blends in enhanced oil recovery | Francis E. Debons, Lawrence E. Whittington | 1989-04-18 |
| 4611659 | Oxidized alkali lignins and their use in enhanced oil recovery | Francis E. Debons, David K. Olsen, William C. Richardson | 1986-09-16 |
| 4548721 | Method of enhanced oil recovery and compositions useful therein | Francis E. Debons, Lawrence E. Whittington | 1985-10-22 |