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Class Information
Number: 48/DIG.6
Name: Gas: heating and illuminating > Underground gasification of coal

Patents under this class:

Patent Number Title Of Patent Date Issued
6880635 In situ production of synthesis gas from a coal formation, the synthesis gas having a selected H2 to CO ratio Apr. 19, 2005
5257497 Producer gas reservoirs for cyclic char fuel oxidation reactors Nov. 2, 1993
4865623 Reactant gas reservoirs for cyclic solid with gas reactors Sep. 12, 1989
4794729 Gas reactant reservoirs for cyclic gas with solid reactors Jan. 3, 1989
4776638 Method and apparatus for conversion of coal in situ Oct. 11, 1988
4698069 Cyclic gas with solid reaction plant Oct. 6, 1987
4692171 Solid with gas reactor plant Sep. 8, 1987
4648450 Method of producing synthesis gas by underground gasification of coal using specific well configuration Mar. 10, 1987
4610303 Method of underground gasification of a series of gently dipping and inclined coal seams Sep. 9, 1986
4568361 Cyclic char gasifier oxidation process Feb. 4, 1986
4549396 Conversion of coal to electricity Oct. 29, 1985
4537603 Cyclic char gasifier devolatilization process Aug. 27, 1985
4533362 Cyclic char gasifier with product gas divider Aug. 6, 1985
4509957 Cyclic char gasifier Apr. 9, 1985
4479540 Gasification of coal Oct. 30, 1984
4476927 Method for controlling H.sub.2 /CO ratio of in-situ coal gasification product gas Oct. 16, 1984
4441554 Method for the underground gasification of coal or browncoal Apr. 10, 1984
4440224 Method of underground fuel gasification Apr. 3, 1984
4381641 Substoichiometric combustion of low heating value gases May. 3, 1983
4313499 Subterranean gasification of bituminous coal Feb. 2, 1982
4303127 Multistage clean-up of product gas from underground coal gasification Dec. 1, 1981
4301875 Method for making holes and producing gas in coal seams Nov. 24, 1981
4299285 Underground gasification of bituminous coal Nov. 10, 1981
4296809 In situ gasification of bituminous coal Oct. 27, 1981
4271676 Method and apparatus for recovering natural gas in a mine Jun. 9, 1981
4243101 Coal gasification method Jan. 6, 1981
4242103 Cyclic two step process for production of methane from carbon monoxide Dec. 30, 1980
4197911 Process for in situ coal gasification Apr. 15, 1980
4122897 In situ gasification process for producing product gas enriched in carbon monoxide and hydrogen Oct. 31, 1978
4114688 Minimizing environmental effects in production and use of coal Sep. 19, 1978
4109719 Method for creating a permeable fragmented zone within a subterranean carbonaceous deposit for in situ coal gasification Aug. 29, 1978
4105251 Dispersion of catalysts with explosives for in situ mining of carbonaceous minerals Aug. 8, 1978
4095650 Method for increasing the calorific value of gas produced by the in situ combustion of coal Jun. 20, 1978
4087130 Process for the gasification of coal in situ May. 2, 1978
4083402 Method of underground gasification of a coal bed Apr. 11, 1978
4063416 Steam generator Dec. 20, 1977
4057293 Process for in situ conversion of coal or the like into oil and gas Nov. 8, 1977
4043395 Method for removing methane from coal Aug. 23, 1977
4024914 Method of processing coal channels in underground coal gasification May. 24, 1977
4018279 In situ coal combustion heat recovery method Apr. 19, 1977
4014721 Ignition mixture for initiating underground in-situ combustion Mar. 29, 1977
4010801 Method of and apparatus for in situ gasification of coal and the capture of resultant generated heat Mar. 8, 1977
4010800 Producing thin seams of coal in situ Mar. 8, 1977
3999607 Recovery of hydrocarbons from coal Dec. 28, 1976
3933447 Underground gasification of coal Jan. 20, 1976

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