| 5114599 |
Use of lignin/amine/surfactant blends in enhanced oil recovery |
Larry D. Pedersen, Lawrence E. Whittington |
1992-05-19 |
| 4821803 |
High salinity polymer drive for surfactant flooding systems |
— |
1989-04-18 |
| 4822501 |
Use of lignin/amine/surfactant blends in enhanced oil recovery |
Larry D. Pedersen, Lawrence E. Whittington |
1989-04-18 |
| 4787454 |
Recovering hydrocarbons with surfactants from lignin |
Douglas G. Naae, Lawrence E. Whittington, Will A. Ledoux |
1988-11-29 |
| 4781251 |
Recovering hydrocarbons with water soluble alkylphenol lignin surfactants |
Douglas G. Naae |
1988-11-01 |
| 4756370 |
Lignin amine surfactant system followed by sequential polymer slugs |
— |
1988-07-12 |
| 4739040 |
Surfactants from lignin |
Douglas G. Naae, Lawrence E. Whittington, Will A. Ledoux |
1988-04-19 |
| 4611659 |
Oxidized alkali lignins and their use in enhanced oil recovery |
Larry D. Pedersen, David K. Olsen, William C. Richardson |
1986-09-16 |
| 4548721 |
Method of enhanced oil recovery and compositions useful therein |
Lawrence E. Whittington, Larry D. Pedersen |
1985-10-22 |
