| 4655942 |
Controlled release dispersant for clay-thickened, water-based drilling fluids |
Israel J. Heilweil |
1987-04-07 |
| 4626362 |
Additive systems for control of fluid loss in aqueous drilling fluids at high temperatures |
Israel J. Heilweil |
1986-12-02 |
| 4608182 |
Vinyl sulfonate amide copolymer and terpolymer combinations for control of filtration in water-based drilling fluids at high temperature |
Israel J. Heilweil |
1986-08-26 |
| 4568446 |
Process for treating modified oil shale to recover shale oil |
Costandi A. Audeh |
1986-02-04 |
| 4512872 |
Process for extracting bitumen from tar sands |
Harold S. Chung |
1985-04-23 |
| 4501651 |
Process for treating oil shale with a mild oxidant |
Costandi A. Audeh |
1985-02-26 |
| 4466882 |
Simultaneous beneficiation and treatment of oil shale |
Costandi A. Audeh, Patrick E. Fowles |
1984-08-21 |
| 4457827 |
Process for extracting bitumen from tar sands |
Harold S. Chung |
1984-07-03 |
| 4368126 |
Method of removing moisture from hydraulic systems |
Constandi A. Audeh |
1983-01-11 |
| 4257869 |
Liquefaction of acid treated coal |
Thomas O. Mitchell, Darrell D. Whitehurst |
1981-03-24 |