Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6207808 | Catalytic method for the preparation of lignin phenol surfactants in organic solvents | Douglas G. Naae, Dan Edward Kieke | 2001-03-27 |
| 6100385 | Catalytic method for the preparation of lignin phenol surfactants in organic solvents | Douglas G. Naae, Dan Edward Kieke | 2000-08-08 |
| 5169559 | Method for forming a high viscosity gel | Douglas G. Naae | 1992-12-08 |
| 5114599 | Use of lignin/amine/surfactant blends in enhanced oil recovery | Francis E. Debons, Larry D. Pedersen | 1992-05-19 |
| 5100567 | Shear-thickening solutions with hydroxypropyl cellulose | Douglas G. Naae | 1992-03-31 |
| 5076361 | Gel method for decreasing permeability around a wellbore | Douglas G. Naae | 1991-12-31 |
| 4822501 | Use of lignin/amine/surfactant blends in enhanced oil recovery | Francis E. Debons, Larry D. Pedersen | 1989-04-18 |
| 4790382 | Alkylated oxidized lignins as surfactants | Lawrence R. Morrow, Michael G. DaGue | 1988-12-13 |
| 4787454 | Recovering hydrocarbons with surfactants from lignin | Douglas G. Naae, Will A. Ledoux, Francis E. Debons | 1988-11-29 |
| 4739041 | Alkylated oxidized lignins as surfactants | Lawrence R. Morrow, Michael G. DaGue | 1988-04-19 |
| 4739040 | Surfactants from lignin | Douglas G. Naae, Will A. Ledoux, Francis E. Debons | 1988-04-19 |
| 4721161 | Method for decreasing permeability around a wellbore | William C. Richardson, Lawrence R. Morrow | 1988-01-26 |
| 4548721 | Method of enhanced oil recovery and compositions useful therein | Francis E. Debons, Larry D. Pedersen | 1985-10-22 |
| 4319636 | Surfactant waterflood oil recovery process | Mohan V. Kudchadker | 1982-03-16 |
| 4299284 | High sweep efficiency enhanced oil recovery process | Alfred Brown, Mohan V. Kudchadker, James E. Varnon | 1981-11-10 |
| 4281714 | Lithium salts as additives in petroleum recovery processes | Warren C. Haltmar | 1981-08-04 |
| 4277352 | Demulsification of emulsions produced from surfactant recovery operations and recovery of surfactants therefrom | Jean B. Allison, Mohan V. Kudchadker | 1981-07-07 |
| 4276933 | Surfactant waterflood method for the recovery of oil | Mohan V. Kudchadker, George Kalfoglou | 1981-07-07 |
| 4193900 | Fire carcass resilient rubber compositions | Marvin L. Deviney, James E. Lewis, Duane K. Chapman | 1980-03-18 |