Assignee
RUHRGAS AG
DE·37 granted patents·616 citations·filing 1976–1998
Top patents by PatentIndex Score
37 records- 0189US5055032AA burner with a flame retention deviceRUHRGAS AG·Filed 1989·Granted Oct 8, 1991·48 cites·29 claims
- 0283US4457704AMethod for the operation of a gas burner exposed to an air current as well as burners to implement the methodRUHRGAS AG·Filed 1982·Granted Jul 3, 1984·37 cites·25 claims
- 0383US4384792AProcess and apparatus for the combustionless measurement and/or control of the amount of heat fed to gas consumption devicesRUHRGAS AG·Filed 1980·Granted May 24, 1983·54 cites·34 claims
- 0482US4541407ACooking station for gas rangesRUHRGAS AG·Filed 1981·Granted Sep 17, 1985·33 cites·24 claims
- 0578US4960378AGas burnerRUHRGAS AG·Filed 1988·Granted Oct 2, 1990·32 cites·20 claims
- 0675US4082520AProcess of producing gases having a high calorific valueRUHRGAS AG·Filed 1976·Granted Apr 4, 1978·18 cites·13 claims
- 0773US5333591ADevice to control a gas-fired applianceRUHRGAS AG·Filed 1993·Granted Aug 2, 1994·32 cites·13 claims
- 0873US4689009ASkid system for carrying a furnace chargeRUHRGAS AG·Filed 1985·Granted Aug 25, 1987·14 cites·21 claims
- 0969US4591337AHeat treatment furnace with crown-shaped transport path for the workpiecesRUHRGAS AG·Filed 1983·Granted May 27, 1986·14 cites·49 claims
- 1068US4545208AMethod of operating an industrial furnaceRUHRGAS AG·Filed 1983·Granted Oct 8, 1985·11 cites·16 claims
- 1164US4659306AMethod of and system for determining the ratio between the oxygen-carrying gas content and the fuel content of a mixtureRUHRGAS AG·Filed 1985·Granted Apr 21, 1987·23 cites·41 claims
- 1264US4557220AGas apparatus for producing hot waterRUHRGAS AG·Filed 1983·Granted Dec 10, 1985·17 cites·25 claims
- 1363US4749002AShut-off device in the form of a ball valveRUHRGAS AG·Filed 1986·Granted Jun 7, 1988·27 cites·19 claims
- 1459US4859171AMethod and apparatus of operating pre-mixed burnersRUHRGAS AG·Filed 1987·Granted Aug 22, 1989·16 cites·15 claims
- 1559US4579523AMethod of operating a controlled atmosphere furnaceRUHRGAS AG·Filed 1985·Granted Apr 1, 1986·13 cites·1 claims
- 1659US4508501AMethod of monitoring furnace installationsRUHRGAS AG·Filed 1983·Granted Apr 2, 1985·15 cites·6 claims
- 1758US4941345AMethod and apparatus for the measurement of gas propertiesRUHRGAS AG·Filed 1987·Granted Jul 17, 1990·22 cites·14 claims
- 1858US4569890AProcess for increasing the heating value of fuel gas mixtures containing hydrogenRUHRGAS AG·Filed 1982·Granted Feb 11, 1986·16 cites·19 claims
- 1956US4585631AMethod for the conversion of nitrogen oxides contained in gaseous products of combustionRUHRGAS AG·Filed 1985·Granted Apr 29, 1986·15 cites·10 claims
- 2053US5188527AMethod of and system for cleaning the surface of furnace rollers of a roller hearth furnaceRUHRGAS AG·Filed 1988·Granted Feb 23, 1993·10 cites·10 claims
- 2150US6425942B1Method and device for drying a gasRUHRGAS AG·Filed 1998·Granted Jul 30, 2002·27 cites·17 claims
- 2250US4501127AHeating system incorporating an absorption-type heat pump and methods for the operation thereofRUHRGAS AG·Filed 1981·Granted Feb 26, 1985·12 cites·43 claims
- 2349US4699122AStorage water heater systemRUHRGAS AG·Filed 1985·Granted Oct 13, 1987·15 cites·32 claims
- 2447US4599092AProcess for the gasification of carbonaceous agglomerates in a fixed bed reactorRUHRGAS AG·Filed 1983·Granted Jul 8, 1986·10 cites·9 claims
- 2547US4530656ABurnerRUHRGAS AG·Filed 1983·Granted Jul 23, 1985·6 cites·13 claims
- 2646US4582476ABurnerRUHRGAS AG·Filed 1985·Granted Apr 15, 1986·8 cites·13 claims
- 2745US4738577AFurnace for the heat treatment of work piecesRUHRGAS AG·Filed 1986·Granted Apr 19, 1988·14 cites·23 claims
- 2844US4439135AProcess for the operation of premixture burners and burner for carrying out the processRUHRGAS AG·Filed 1980·Granted Mar 27, 1984·5 cites·6 claims
- 2938US4596610AHardening metal partsRUHRGAS AG·Filed 1984·Granted Jun 24, 1986·5 cites·21 claims
- 3036US5913326AAutomatic closing device for a shut-off deviceRUHRGAS AG·Filed 1994·Granted Jun 22, 1999·10 cites·15 claims
- 3136US4723873AMethod and device for preparing an existing buried conduit for replacement by a new conduitRUHRGAS AG·Filed 1986·Granted Feb 9, 1988·15 cites·19 claims
- 3235US4886450ACooled tubular assembly for industrial reheating furnaceRUHRGAS AG·Filed 1988·Granted Dec 12, 1989·6 cites·12 claims
- 3333US4802142ADevice for controlling the flow rate of a fuel gas/air mixture and/or the ratio between fuel gas and air in a fuel gas/air mixtureRUHRGAS AG·Filed 1987·Granted Jan 31, 1989·5 cites·9 claims
- 3430US4612065AMethod for the heat treatment of workpiecesRUHRGAS AG·Filed 1985·Granted Sep 16, 1986·2 cites·16 claims
- 3526US6193502B1Fuel combustion device and methodRUHRGAS AG·Filed 1998·Granted Feb 27, 2001·7 cites·18 claims
- 3622US4618282AComposition and a method for covering the sump in cavitiesRUHRGAS AG·Filed 1983·Granted Oct 21, 1986·1 cites·14 claims
- 3722US4403887AMethod of covering the sump of underground cavitiesRUHRGAS AG·Filed 1981·Granted Sep 13, 1983·1 cites·5 claims
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