Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Process of underground coal gasification

Process of underground coal gasification

US Patent 4356866 · Granted Nov 2, 1982

Estimated economic value: $7,694,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Waterflooding employing thickened surfactant solutions1988
Method for comminuting bituminous coal using an aqueous methanol solution1985
Method for removing ash mineral matter of coal with liquid carbon dioxide and wa1985
Method for improving cuttings transport in deviated wells1985
In-situ uranium leaching process1984
Process for recovery of mineral values from subterranean formations1984
Method for operating rotary drilling under conditions of high cuttings transport1984
Conditioning a coal seam prior to in-situ gasification1983
Transporting particulate solid material as a slurry through a pipeline1981
Oil recovery by waterflooding with thickened surfactant solutions1980