Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4720348 | Waterflooding employing thickened surfactant solutions | — | 1988-01-19 |
| 4533084 | Method for comminuting bituminous coal using an aqueous methanol solution | Ju-Nam Chew | 1985-08-06 |
| 4522628 | Method for removing ash mineral matter of coal with liquid carbon dioxide and water | — | 1985-06-11 |
| 4496012 | Method for improving cuttings transport in deviated wells | — | 1985-01-29 |
| 4489984 | In-situ uranium leaching process | — | 1984-12-25 |
| 4489042 | Process for recovery of mineral values from subterranean formations | Warren F. Johnson | 1984-12-18 |
| 4473124 | Method for operating rotary drilling under conditions of high cuttings transport efficiency | — | 1984-09-25 |
| 4393934 | Conditioning a coal seam prior to in-situ gasification | James Melrose | 1983-07-19 |
| 4356866 | Process of underground coal gasification | — | 1982-11-02 |
| 4305688 | Transporting particulate solid material as a slurry through a pipeline | — | 1981-12-15 |
| 4181178 | Oil recovery by waterflooding with thickened surfactant solutions | — | 1980-01-01 |