BRITISH GAS PLC

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 1124
 
  
 
B61B RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR 117
 
  
 
B61G COUPLINGS SPECIALLY ADAPTED FOR RAILWAY VEHICLES; DRAUGHT OR BUFFING APPLIANCES SPECIALLY ADAPTED FOR RAILWAY VEHICLES117
 
  
 
F16L PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL169
 
  
 
G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS198
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 1205
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 1361
 
  
 
H01M PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 1153

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6344289 Reactant flow arrangement of a power system of several internal reforming fuel cell stacksJul 02, 99Feb 05, 02[H01M]
D398336 Game board data map, data packages and solutionOct 23, 96Sep 15, 98[2101]
D391319 Game board data packageOct 23, 96Feb 24, 98[2101]
D388130 Game board solutionOct 23, 96Dec 23, 97[2101]
D386541 Game boardMay 24, 95Nov 18, 97[2101]
5580589 Apparatus for bending plastic pipeJun 13, 94Dec 03, 96[F16L, B29C]
5473246 Joint on discontinuity detector and sealer for use with pipesNov 17, 93Dec 05, 95[G01N, G01R]
5399967 Motion transducerMar 15, 93Mar 21, 95[H01L, G01B]
5272986 Towing swivel for pipe inspection or other vehicleApr 07, 93Dec 28, 93[B61G, B61B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2002/0131,901 Gas sensorsAbandonedApr 01, 02Sep 19, 02[G01N, B32B]
6172134 Anaerobically curable compositionExpiredDec 11, 96Jan 09, 01[C08J, C09J, C08K]
6042727 Porous amorphous silica-alumina refractory oxides, their preparation and use as separation membranesExpiredAug 25, 98Mar 28, 00[B01D]
6008780 Diver communication equipmentExpiredMar 28, 96Dec 28, 99[G09G]
5993200 Fuel fired burnersExpiredJun 13, 96Nov 30, 99[F23D]
5950969 Frame for signExpiredMar 17, 95Sep 14, 99[G09F, A47F]
5936156 Liquid meteringExpiredApr 02, 97Aug 10, 99[G01F]
5916831 CarburetorExpiredMar 14, 97Jun 29, 99[F02B]
5902043 Apparatus and method for measuring heat power consumed in or extracted from a regionExpiredJul 02, 96May 11, 99[G01K, .19/]
5878784 Pipe blocking techniqueExpiredAug 15, 97Mar 09, 99[F16L]
5871646 Porous amorphous silica-alumina refractory oxides, their preparation and use as separation membranesExpiredJul 18, 97Feb 16, 99[C01B, B01D]
5839475 Method and apparatus for lining a pipe with a polymer linearExpiredFeb 24, 97Nov 24, 98[F16L]
5823115 Guiding of a pipe travelling deviceExpiredSep 05, 95Oct 20, 98[B61B]
5824179 Method of joining reinforced thermoplastic pipesExpiredMar 12, 96Oct 20, 98[F16L, B32B]
5820299 Building modules and assemblies made from such modulesExpiredMar 22, 96Oct 13, 98[F16L, E02B]
5797432 Pipe repair clampExpiredDec 11, 96Aug 25, 98[F16L]
5795144 Fuel-fired burnersExpiredOct 07, 96Aug 18, 98[F23C]
5775031 Temporary cover for excavationsExpiredApr 04, 96Jul 07, 98[B62D]
5753794 Internal combustion engine having oxygen sensor with reference criterion calibrationExpiredApr 24, 96May 19, 98[G01M]
5740829 Method of sealing an outlet openingExpiredJul 25, 95Apr 21, 98[F16K, F16L]

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