British Gas
139Patents
0Active
139Granted
42Portfolio score
Filing activity: Dec 20, 1973 → Aug 9, 1995
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4133825A | Production of substitute natural gas | Chemistry; Metallurgy | 289 | Expired |
| US4400182A | Vaporization and gasification of hydrocarbon feedstocks | Chemistry; Metallurgy | 129 | Expired |
| US4105972A | Pipeline inspection vehicle for detecting defects in pipeline walls | Physics | 117 | Expired |
| US4674914A | Replacing mains | Fixed Constructions | 100 | Expired |
| US4738565A | Method of replacing mains | Emerging Cross-Sectional Technologies | 80 | Expired |
| US4720211A | Apparatus for replacing mains | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4104201A | Catalytic steam reforming and catalysts therefor | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4505302A | Replacement of mains | Emerging Cross-Sectional Technologies | 59 | Expired |
| US4127393A | Method and apparatus for vaporizing hydrocarbon based liquids | Chemistry; Metallurgy | 49 | Expired |
| US4653782A | Pipe repair clamp | Mechanical Engineering; Lighting; Heating | 44 | Expired |
| US4417905A | Gas making | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4646575A | Ultrasonic flowmeter | Performing Operations; Transporting | 35 | Expired |
| US4857851A | Fixing a geographical reference of a vehicle traveling through a pipeline | Physics | 34 | Expired |
| US4295095A | Apparatus and method for detecting the location of metallic objects having alternating current passing therethrough | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4582551A | Sealing joints and leaks with an anaerobic liquid | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4729883A | Acid gas removal process | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4414633A | Data processing and recording apparatus | Physics | 30 | Expired |
| US4728897A | Microwave reflection survey technique for determining depth and orientation of buried objects | Physics | 30 | Expired |
| US4693404A | Mains bursting tool | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4315407A | Gas storage and transmission systems | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US4173886A | Gas detectors | Physics | 29 | Expired |
| US4447777A | Magnetic pipeline inspection vehicle with metallic foil and bristle contacts supporting the vehicle | Physics | 29 | Expired |
| USD282246S | Portable transmitter unit for a metallic object detector | General | 28 | Expired |
| US3930324A | Mechanical excavating machines including rotary cutter and suction tube | Fixed Constructions | 28 | Expired |
| USD282350S | Portable receiver unit for a metallic object detector | General | 27 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.