Assignee
RUHRKOHLE AG
DE·62 granted patents·921 citations·filing 1974–1995
Top patents by PatentIndex Score
62 records- 0193US4929179ARoof structureRUHRKOHLE AG·Filed 1988·Granted May 29, 1990·96 cites·14 claims
- 0292US4609227ACutting-tool mounting for rotary excavating headRUHRKOHLE AG·Filed 1983·Granted Sep 2, 1986·115 cites·12 claims
- 0392US4495495AStaff-location and signalling system for use in minesRUHRKOHLE AG·Filed 1982·Granted Jan 22, 1985·113 cites·19 claims
- 0490US4394217AApparatus for servicing coke ovensRUHRKOHLE AG·Filed 1981·Granted Jul 19, 1983·78 cites·13 claims
- 0587US4385962AMethod for the production of cokeRUHRKOHLE AG·Filed 1981·Granted May 31, 1983·54 cites·1 claims
- 0686US4477338AMethod and apparatus for processing high-ash coal slurries by flotation, particularly for processing gas coal and open-burning coal which are difficult to floatRUHRKOHLE AG·Filed 1982·Granted Oct 16, 1984·60 cites·39 claims
- 0777US4008921AAutomatic excavating machine and method of operating the sameRUHRKOHLE AG·Filed 1975·Granted Feb 22, 1977·35 cites·7 claims
- 0869US4352675ACoal gasification reactorRUHRKOHLE AG·Filed 1979·Granted Oct 5, 1982·14 cites·18 claims
- 0967US4186970ASectional conveyor with sectional rack fixed on the conveyor at only a single locationRUHRKOHLE AG·Filed 1977·Granted Feb 5, 1980·13 cites·9 claims
- 1062US5045179AProcess for the hydrogenation reprocessing of used oilsRUHRKOHLE AG·Filed 1988·Granted Sep 3, 1991·19 cites·23 claims
- 1160US4741809ACoke oven doors for horizontal-chamber coke ovensRUHRKOHLE AG·Filed 1986·Granted May 3, 1988·10 cites·18 claims
- 1259US4481011ACoke oven charge mixtures with coal binderRUHRKOHLE AG·Filed 1982·Granted Nov 6, 1984·7 cites·8 claims
- 1357US4136998AProcess for the disposal of the residue of the exhaust gas washers of furnaces in particular bituminous coal power stationsRUHRKOHLE AG·Filed 1977·Granted Jan 30, 1979·15 cites·6 claims
- 1457US4029362AArrangement for hydraulically conveying solidsRUHRKOHLE AG·Filed 1975·Granted Jun 14, 1977·16 cites·11 claims
- 1554US4555325AMethod for interconnecting thermally and pressure-stressed multi-phase reactorsRUHRKOHLE AG·Filed 1984·Granted Nov 26, 1985·12 cites·4 claims
- 1653US4594904ASampling valve for a fixed bed reactor coal gasification plantRUHRKOHLE AG·Filed 1984·Granted Jun 17, 1986·13 cites·7 claims
- 1753US4421604AProcedure to control quality of coalRUHRKOHLE AG·Filed 1981·Granted Dec 20, 1983·6 cites·11 claims
- 1850US4715809AFluidized bed having modified surfaces in the heat extractorRUHRKOHLE AG·Filed 1985·Granted Dec 29, 1987·18 cites·7 claims
- 1948US4563196ACoal charging in a coal gasification installationRUHRKOHLE AG·Filed 1984·Granted Jan 7, 1986·10 cites·8 claims
- 2046US5150543ADoorRUHRKOHLE AG·Filed 1990·Granted Sep 29, 1992·7 cites·24 claims
- 2146US4683032ACoke oven doors for horizontal chamber coke ovensRUHRKOHLE AG·Filed 1985·Granted Jul 28, 1987·5 cites·16 claims
- 2246US4445937APneumatic stowing of construction material comprising calcium alpha- and beta-sulphate hemihydratesRUHRKOHLE AG·Filed 1981·Granted May 1, 1984·13 cites·14 claims
- 2345US4512850AProcess for wet quenching of coal-cokeRUHRKOHLE AG·Filed 1981·Granted Apr 23, 1985·4 cites·6 claims
- 2445US4410399ASelf-sealing door assembly for a coke ovenRUHRKOHLE AG·Filed 1981·Granted Oct 18, 1983·4 cites·6 claims
- 2543US5015457AProcess for the hydrogenation of organochlorine compounds, neutralization of the hydrochloric acid obtained and a neutralization agent for hydrochloric acid obtained from organochlorine compoundsRUHRKOHLE AG·Filed 1989·Granted May 14, 1991·13 cites·5 claims
- 2642US4952284ALocking device for an oven doorRUHRKOHLE AG·Filed 1988·Granted Aug 28, 1990·4 cites·13 claims
- 2741US5155966ARoof structureRUHRKOHLE AG·Filed 1990·Granted Oct 20, 1992·4 cites·7 claims
- 2841US4740271ACoke oven doors for horizontal-chamber coke ovensRUHRKOHLE AG·Filed 1986·Granted Apr 26, 1988·3 cites·19 claims
- 2940US4927501AOven doorRUHRKOHLE AG·Filed 1988·Granted May 22, 1990·3 cites·17 claims
- 3040US4674418ACyclone cleaner for a fixed bed reactorRUHRKOHLE AG·Filed 1985·Granted Jun 23, 1987·7 cites·12 claims
- 3139US4361079AApparatus for extending ventilating conduitsRUHRKOHLE AG·Filed 1980·Granted Nov 30, 1982·14 cites·9 claims
- 3239US3961307AExploration of the boundaries of an underground coal seamRUHRKOHLE AG·Filed 1974·Granted Jun 1, 1976·12 cites·9 claims
- 3338US5107180ASystem for operating a portable lampRUHRKOHLE AG·Filed 1990·Granted Apr 21, 1992·11 cites·24 claims
- 3437US5039379ADry cooling of cokeRUHRKOHLE AG·Filed 1988·Granted Aug 13, 1991·3 cites·5 claims
- 3536US4670023AGas generator installationRUHRKOHLE AG·Filed 1985·Granted Jun 2, 1987·2 cites·20 claims
- 3636US4231846APlug for protecting coke-oven chamber doors from the action of the internal temperature in the ovenRUHRKOHLE AG·Filed 1978·Granted Nov 4, 1980·4 cites·12 claims
- 3735US4441840AProcess for the disposal and economic use of the residue of the exhaust gas washers of furnaces in relation to waste productsRUHRKOHLE AG·Filed 1980·Granted Apr 10, 1984·7 cites·7 claims
- 3835US4389792ADrill core inclinometerRUHRKOHLE AG·Filed 1981·Granted Jun 28, 1983·7 cites·7 claims
- 3935US4344357AApparatus for extending ventilating conduitsRUHRKOHLE AG·Filed 1980·Granted Aug 17, 1982·13 cites·29 claims
- 4032US4602992ACoal hydrogenation process with integrated refining stageRUHRKOHLE AG·Filed 1985·Granted Jul 29, 1986·4 cites·3 claims
- 4132US4566880AReactor for coal gasificationRUHRKOHLE AG·Filed 1982·Granted Jan 28, 1986·4 cites·2 claims
- 4230US4992657AApparatus for detecting the cutting horizon for mining machinesRUHRKOHLE AG·Filed 1988·Granted Feb 12, 1991·12 cites·18 claims
- 4330US4741822AProcedure for hydrogenation of coal by means of liquid phase and fixed-bed catalyst hydrogenationRUHRKOHLE AG·Filed 1986·Granted May 3, 1988·6 cites·6 claims
- 4430US4514191ASlag removal apparatusRUHRKOHLE AG·Filed 1982·Granted Apr 30, 1985·2 cites·27 claims
- 4530US4361961ADevice for measuring the angular orientation of horizontal boresRUHRKOHLE AG·Filed 1981·Granted Dec 7, 1982·2 cites·7 claims
- 4630US4350392ACoal extraction in a longwall workingRUHRKOHLE AG·Filed 1976·Granted Sep 21, 1982·5 cites·2 claims
- 4729US5100536AMethod of processing substancesRUHRKOHLE AG·Filed 1990·Granted Mar 31, 1992·5 cites·5 claims
- 4828US4986032ADoorRUHRKOHLE AG·Filed 1990·Granted Jan 22, 1991·2 cites·14 claims
- 4928US4058455ARotary separatorRUHRKOHLE AG·Filed 1976·Granted Nov 15, 1977·7 cites·9 claims
- 5027US5279713ADoorRUHRKOHLE AG·Filed 1992·Granted Jan 18, 1994·0 cites·14 claims
Showing the top 50 of 62 patent records by PatentIndex Score.
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