Assignee
BRITISH GAS PLC
GB·204 granted patents·1 pending application·4,342 citations·filing 1985–2002
Top patents by PatentIndex Score
205 records- 0197US5878783APipeline vehicleBRITISH GAS PLC·Filed 1996·Granted Mar 9, 1999·206 cites·23 claims
- 0296US6107795APipeline vehicle with linked modules and carriagesBRITISH GAS PLC·Filed 1998·Granted Aug 22, 2000·172 cites·14 claims
- 0396US6031371ASelf-powered pipeline vehicle for carrying out an operation on a pipeline and methodBRITISH GAS PLC·Filed 1996·Granted Feb 29, 2000·242 cites·30 claims
- 0493US5500149AProcesses for the conversion of methane to synthesis gasBRITISH GAS PLC·Filed 1995·Granted Mar 19, 1996·116 cites·1 claims
- 0591US5595342AControl systemBRITISH GAS PLC·Filed 1994·Granted Jan 21, 1997·312 cites·43 claims
- 0690US5002137AMoling systemBRITISH GAS PLC·Filed 1989·Granted Mar 26, 1991·106 cites·12 claims
- 0789US5878784APipe blocking techniqueBRITISH GAS PLC·Filed 1997·Granted Mar 9, 1999·73 cites·10 claims
- 0888US4807695ARegenerator for a regenerative heating systemBRITISH GAS PLC·Filed 1988·Granted Feb 28, 1989·29 cites·2 claims
- 0987US5552640AElectrical power generating arrangement with computer control for varying engine speed as a function of load demandBRITISH GAS PLC·Filed 1994·Granted Sep 3, 1996·75 cites·12 claims
- 1086US5461931AMeasurement systemBRITISH GAS PLC·Filed 1992·Granted Oct 31, 1995·53 cites·22 claims
- 1184US5431855AProcesses for the conversion of methane to synthesis gasBRITISH GAS PLC·Filed 1992·Granted Jul 11, 1995·41 cites·9 claims
- 1284US4718454AValve operating systemBRITISH GAS PLC·Filed 1986·Granted Jan 12, 1988·58 cites·9 claims
- 1383US5178018ASystem for measuring the time for a signal to pass between two spaced points in a fluidBRITISH GAS PLC·Filed 1990·Granted Jan 12, 1993·48 cites·31 claims
- 1482US5482076AEnhancing pipesBRITISH GAS PLC·Filed 1994·Granted Jan 9, 1996·35 cites·6 claims
- 1581US5536473APolyaniline gas sensorBRITISH GAS PLC·Filed 1994·Granted Jul 16, 1996·46 cites·3 claims
- 1681US5497807AApparatus for introducing sealant into a clearance between an existing pipe and a replacement pipeBRITISH GAS PLC·Filed 1994·Granted Mar 12, 1996·53 cites·28 claims
- 1780US5992897AJoining lined pipe itemsBRITISH GAS PLC·Filed 1996·Granted Nov 30, 1999·46 cites·15 claims
- 1880US4987018AJoining polyolefinic members by fusionBRITISH GAS PLC·Filed 1989·Granted Jan 22, 1991·40 cites·8 claims
- 1979US5740829AMethod of sealing an outlet openingBRITISH GAS PLC·Filed 1995·Granted Apr 21, 1998·47 cites·8 claims
- 2079US5635626AMeasurement of a gas characteristicBRITISH GAS PLC·Filed 1995·Granted Jun 3, 1997·42 cites·17 claims
- 2179US4994959AFuel burner apparatus and a method of controlBRITISH GAS PLC·Filed 1988·Granted Feb 19, 1991·43 cites·9 claims
- 2275US6241875B1Method of providing heatBRITISH GAS PLC·Filed 1998·Granted Jun 5, 2001·43 cites·19 claims
- 2374US5971404ASelf-centering suspension for in-pipe useBRITISH GAS PLC·Filed 1996·Granted Oct 26, 1999·42 cites·4 claims
- 2474US5539258AElectrical power generating arrangement having engine throttle and transmission ratio control responsive to load power demandBRITISH GAS PLC·Filed 1994·Granted Jul 23, 1996·40 cites·7 claims
- 2574US5127116APipe jointBRITISH GAS PLC·Filed 1990·Granted Jul 7, 1992·41 cites·9 claims
- 2673US5824179AMethod of joining reinforced thermoplastic pipesBRITISH GAS PLC·Filed 1994·Granted Oct 20, 1998·40 cites·7 claims
- 2773US4971632AMiniature thermoelectric convertersBRITISH GAS PLC·Filed 1988·Granted Nov 20, 1990·25 cites·16 claims
- 2870US5601936AMethod of operating a fuel cellBRITISH GAS PLC·Filed 1995·Granted Feb 11, 1997·65 cites·28 claims
- 2970US5243863AFluid flow measurement system using two transducers with partitions therebetweenBRITISH GAS PLC·Filed 1991·Granted Sep 14, 1993·29 cites·25 claims
- 3070US4983225AProcess of manufacturing miniature thermoelectric convertersBRITISH GAS PLC·Filed 1989·Granted Jan 8, 1991·22 cites·4 claims
- 3170US4777984AMethod for lining a pipe or mainBRITISH GAS PLC·Filed 1987·Granted Oct 18, 1988·41 cites·11 claims
- 3269US6047589AApparatus for measuring a gas valueBRITISH GAS PLC·Filed 1997·Granted Apr 11, 2000·36 cites·18 claims
- 3369US4967199AGround probing radar method and apparatusBRITISH GAS PLC·Filed 1989·Granted Oct 30, 1990·36 cites·6 claims
- 3469US4756688AApparatus and method for the flow control of flue gas to combustion air in a regenerative heating systemBRITISH GAS PLC·Filed 1987·Granted Jul 12, 1988·12 cites·7 claims
- 3569US4676744ARegenerative heating apparatusBRITISH GAS PLC·Filed 1985·Granted Jun 30, 1987·30 cites·3 claims
- 3667US5393222AThermoelectric sensorBRITISH GAS PLC·Filed 1992·Granted Feb 28, 1995·31 cites·26 claims
- 3767US4944674AApparatus for heating a vesselBRITISH GAS PLC·Filed 1989·Granted Jul 31, 1990·11 cites·14 claims
- 3866US5048174AMethod and apparatus for lining a buried pipe with a polymer liningBRITISH GAS PLC·Filed 1990·Granted Sep 17, 1991·26 cites·16 claims
- 3966US4963421AJoining polyolefinic members by fusionBRITISH GAS PLC·Filed 1989·Granted Oct 16, 1990·26 cites·17 claims
- 4065US6008780ADiver communication equipmentBRITISH GAS PLC·Filed 1994·Granted Dec 28, 1999·35 cites·21 claims
- 4165US5997278AApparatus for providing an air/fuel mixture to a fully premixed burnerBRITISH GAS PLC·Filed 1996·Granted Dec 7, 1999·28 cites·10 claims
- 4265US4887750ARack arrangementBRITISH GAS PLC·Filed 1988·Granted Dec 19, 1989·37 cites·16 claims
- 4363US6116082AMethod and apparatus for testing a fluid conduit system for leaksBRITISH GAS PLC·Filed 1996·Granted Sep 12, 2000·29 cites·19 claims
- 4463US5159756AMethod of and apparatus for cutting a pipeBRITISH GAS PLC·Filed 1990·Granted Nov 3, 1992·29 cites·4 claims
- 4562US6111155AMethod of producing gas hydrate in two or more hydrate forming regionsBRITISH GAS PLC·Filed 1997·Granted Aug 29, 2000·24 cites·22 claims
- 4662US5368669AMethod of lining a pipelineBRITISH GAS PLC·Filed 1993·Granted Nov 29, 1994·24 cites·4 claims
- 4762US5182516AMoling system including transmitter-carrying mole for detecting and displaying the roll angle of the moleBRITISH GAS PLC·Filed 1990·Granted Jan 26, 1993·43 cites·13 claims
- 4861US5685572AFitting and pipe joint using the fittingBRITISH GAS PLC·Filed 1996·Granted Nov 11, 1997·27 cites·17 claims
- 4960US6505501B1Apparatus and method for use in testing gas pressure reduction equipmentBRITISH GAS PLC·Filed 1996·Granted Jan 14, 2003·22 cites·21 claims
- 5060US5936156ALiquid meteringBRITISH GAS PLC·Filed 1997·Granted Aug 10, 1999·27 cites·15 claims
Showing the top 50 of 205 patent records by PatentIndex Score.
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