Gas Research Institute
646Patents
0Active
646Granted
46Portfolio score
Filing activity: Aug 30, 1977 → Dec 7, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5706191A | Appliance interface apparatus and automated residence management system | Emerging Cross-Sectional Technologies | 503 | Expired |
| US5926776A | Smart thermostat having a transceiver interface | Physics | 234 | Expired |
| US4889280A | Temperature and humidity auctioneering control | Mechanical Engineering; Lighting; Heating | 185 | Expired |
| US5759022A | Method and system for reducing NO.sub.x and fuel emissions in a furnace | Emerging Cross-Sectional Technologies | 148 | Expired |
| US5801940A | Fault-tolerant HVAC system | Emerging Cross-Sectional Technologies | 139 | Expired |
| US5172639A | Cornering pipe traveler | Mechanical Engineering; Lighting; Heating | 134 | Expired |
| US6060719A | Fail safe gas furnace optical flame sensor using a transconductance amplifier and low photodiode current | Mechanical Engineering; Lighting; Heating | 114 | Expired |
| US5224011A | Multifunction protective relay system | Electricity | 112 | Expired |
| US5351497A | Low-flow internally-cooled liquid-desiccant absorber | Mechanical Engineering; Lighting; Heating | 111 | Expired |
| US5346683A | Uncapped and thinned carbon nanotubes and process | Emerging Cross-Sectional Technologies | 110 | Expired |
| US5763114A | Integrated reformer/CPN SOFC stack module design | Emerging Cross-Sectional Technologies | 106 | Expired |
| US5022970A | Photoelectrochemical reduction of carbon oxides | Emerging Cross-Sectional Technologies | 103 | Expired |
| US5576703A | Method and apparatus for communicating signals from within an encased borehole | Fixed Constructions | 102 | Expired |
| US6061604A | RF base repeater for automated residence management system | Physics | 99 | Expired |
| US5238488A | Process and solution for transforming insoluble mercury metal into a soluble compound | Chemistry; Metallurgy | 98 | Expired |
| US5463005A | Copolymers of tetrafluoroethylene and perfluorinated sulfonyl monomers and membranes made therefrom | Chemistry; Metallurgy | 97 | Expired |
| US4918995A | Electronic gas meter | Emerging Cross-Sectional Technologies | 97 | Expired |
| US4609441A | Electrochemical reduction of aqueous carbon dioxide to methanol | Chemistry; Metallurgy | 93 | Expired |
| US4812812A | Apparatus and method for determining the position and orientation of a remote object | Electricity | 93 | Expired |
| US5713320A | Internal combustion engine starting apparatus and process | Mechanical Engineering; Lighting; Heating | 92 | Expired |
| US4955205A | Method of conditioning building air | Mechanical Engineering; Lighting; Heating | 92 | Expired |
| US4862808A | Robotic pipe crawling device | Performing Operations; Transporting | 91 | Expired |
| US4600356A | Underground pipeline and cable detector and process | Fixed Constructions | 90 | Expired |
| US5602758A | Installation link-up procedure | Mechanical Engineering; Lighting; Heating | 90 | Expired |
| US5273115A | Method for refracturing zones in hydrocarbon-producing wells | Fixed Constructions | 86 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.