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Class Information
Number: 340/633
Name: Communications: electrical > Condition responsive indicating system > Specific condition > Fluent material > Gas > Catalytic detector
Description: Subject matter wherein the gas sensor includes a catalyst to induce a chemical reaction producing a parameter to which the sensor is responsive (e.g., heat).










Patents under this class:
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Patent Number Title Of Patent Date Issued
8629781 Efficiency determination for a selective-catalytic-reduction catalyst Jan. 14, 2014
8314712 Bulk grain storage spoilage detection apparatus Nov. 20, 2012
7542879 Virtual sensor based control system and method Jun. 2, 2009
7504959 Gas monitoring using electrochemical cell and method of operating Mar. 17, 2009
7365648 Fire alarm Apr. 29, 2008
7310047 Gas alarm system with wind direction indicator Dec. 18, 2007
7224285 Gas monitor using electrochemical cell and method of operating May. 29, 2007
7091870 Security system and method of security service business Aug. 15, 2006
6998991 Dual carbon monoxide sensor system with control catalyst: new CO and humidity method and apparatus Feb. 14, 2006
6985082 Carbon monoxide sensor and method of use Jan. 10, 2006
6917875 Method and apparatus for processing and display of diesel injection waveform Jul. 12, 2005
6900734 Capillary-discharge based detector for chemical vapor monitoring May. 31, 2005
6888467 Gas detection instrument and method for its operation May. 3, 2005
6850165 Catalyst deterioration detecting system for an automobile Feb. 1, 2005
6812708 Combustible-gas measuring instrument Nov. 2, 2004
6801112 Device for switching a connection according to the state of an apparatus to be monitored, especially a safety switch Oct. 5, 2004
6700484 Networked miniature chemical optical sensors Mar. 2, 2004
6670887 Apparatus and method for wireless gas monitoring Dec. 30, 2003
6433696 Carbon monoxide emitting apparatus, carbon monoxide monitor shutoff, and circuit therefor Aug. 13, 2002
6353395 Interconnectable detector with local alarm indicator Mar. 5, 2002
6348872 Gas detector-alarm employing hot-wire gas sensor Feb. 19, 2002
6191696 Alarm system for hand-held chemical monitor Feb. 20, 2001
6060025 Systems and methods for catalyst reactivation May. 9, 2000
5969623 Gas alarm Oct. 19, 1999
5895629 Ring oscillator based chemical sensor Apr. 20, 1999
5886638 Method and apparatus for testing a carbon monoxide sensor Mar. 23, 1999
5844492 Water leakage detection and gas shut-off device Dec. 1, 1998
5841021 Solid state gas sensor and filter assembly Nov. 24, 1998
5764150 Gas alarm Jun. 9, 1998
5694118 Gas detection and alarm system for monitoring gas such as carbon monoxide Dec. 2, 1997
5670949 Carbon monoxide/hydrocarbon thin film sensor Sep. 23, 1997
5563578 Detection of hazardous gas leakage Oct. 8, 1996
5526280 Method and system for gas detection Jun. 11, 1996
5365216 Catalyst monitoring using ego sensors Nov. 15, 1994
5363091 Catalyst monitoring using ego sensors Nov. 8, 1994
5319346 Conversion from odd to non-zero winding number specification using an extended frame buffer Jun. 7, 1994
5252949 Chemical sensor for carbon monoxide detection Oct. 12, 1993
5177464 Catalyst monitoring using a hydrocarbon sensor Jan. 5, 1993
5055269 Temperature limited catalytic gas detector apparatus Oct. 8, 1991
4992244 Films of dithiolene complexes in gas-detecting microsensors Feb. 12, 1991
4914424 Oxygen concentration monitor using galvanic cell type oxygen sensor Apr. 3, 1990
4884066 Deterioration detector system for catalyst in use for emission gas purifier Nov. 28, 1989
4818977 Combustible gas detector having temperature stabilization capability Apr. 4, 1989
4697450 Gas monitor having trend indicators Oct. 6, 1987
4652831 Inflammable gas detector with prearranged action Mar. 24, 1987
4562723 Method of and apparatus for the measurement of subterranean atmospheric parameters Jan. 7, 1986
4482311 Burner with oxygen shortage sensor Nov. 13, 1984
4476096 Circuit arrangement for an apparatus for measuring and indicating the concentration of combustible gases and vapors contained in air Oct. 9, 1984
4397888 Thick film sensor for hydrogen and carbon monoxide Aug. 9, 1983
4375353 Heater for catalytic type propane or organic gas detector Mar. 1, 1983

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