Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6207808 | Catalytic method for the preparation of lignin phenol surfactants in organic solvents | Douglas G. Naae, Lawrence E. Whittington | 2001-03-27 |
| 6100385 | Catalytic method for the preparation of lignin phenol surfactants in organic solvents | Douglas G. Naae, Lawrence E. Whittington | 2000-08-08 |
| 5911276 | Use of unmodified kraft lignin, an amine and a water-soluble sulfonate composition in enhanced oil recovery | — | 1999-06-15 |
| 5035288 | Lignin phenol/lignin/amine surfactant system | Douglas G. Naae | 1991-07-30 |