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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7372026 | System for repositioning a microfabricated cantilever A system for repositioning a microfabricated cantilever includes a microfabricated cantilever, a first device operable to detect a position of the microfabricated cantilever, and a second device. The first device is operable to determine an offset in the position of... | 05/13/2008 |
| 7357015 | Gas concentration sensor, hydrogen purification unit using this and fuel cell system In order to provide a step capable of reliably detecting a CO concentration in a reformed gas at low cost and a hydrogen purifier capable of fully exerting a function of a CO purifying catalyst, a gas concentration detector comprising a reaction chamber which has a ... | 04/15/2008 |
| 7341694 | Ammonia sensor In an ammonia sensor (1), lead portions (7) and (9) are provided on an insulating substrate (5); a pair of comb-shaped electrodes (11) and (13) are connected to the lead portions (7) and (9), respectively; a se... | 03/11/2008 |
| 7329389 | Sensor device and method for qualitative and quantitative analysis of gas phase substances New sensors and methods for qualitative and quantitative analysis of multiple gaseous substances simultaneously with both high selectivity and high sensitivity are provided. The new sensors rely on a characteristic difference in energy between the interaction of a p... | 02/12/2008 |
| 7297549 | Method of determining measurement bias in an emissions monitoring system A method of determining bias in a measurement of a constituent concentration level in a sample gas is provided. The method comprises establishing a sample gas flow from an emission stream into a sample gas line of an emissions monitoring system. The method further c... | 11/20/2007 |
| 7269993 | Gas detecting apparatus, gas detecting method and fuel cell vehicle The gas detecting system of the present invention is equipped with a catalytic combustion type gas sensor 1a and a semiconductor type gas sensor 1b, in a gas detecting system 1 having an operating sate in which generation of electr... | 09/18/2007 |
| 7255836 | Analytical sensitivity enhancement by catalytic transformation A device and method for quantifying an impurity in an input gas stream. The device and method employ a catalyst to convert the impurity to a detectable species in an output gas stream, and the concentration of the detectable species is then measured by means of a de... | 08/14/2007 |
| 7223328 | Sensors for reducing gas molecules Provided is a gas molecule sensor, characterized in that the sensing element is a polycrystalline tin oxide film having a thickness less than 1 μm. The sensing element is produced by electrolytic deposit of a tin film on an insulating support in an electromechanica... | 05/29/2007 |
| 7211222 | Gas sensor A powder filler is stuffed in a filler space defined between a housing and a gas sensing element so as to airtightly seal a clearance between the housing and the gas sensing element. The powder filler contains grains whose diameter is in a range from 80 μm to 5,000... | 05/01/2007 |
| 7191639 | On-chip magnetic force actuation of microcantilevers by coplanar coils An on-chip coil is provided in a micromachined device for magnetic actuation of a nanoelectromechanical microcantilever. The novel geometry involves a three dimensional solenoid or planar coil carrying high current that generates a large enough magnetic field in its... | 03/20/2007 |
| 7189363 | Gas detector Of a gas detector 100, a chamber 105 formed between a center cover 150 and a cover 160 is a part of an air flow channel AF. A first shielding plate 165 is provided in the chamber 105. Water droplets that have entered the cha... | 03/13/2007 |
| 7112447 | Hand held gas analyzer A lightweight and portable analyzer is provided. At least one component of the analyzer is made from a lightweight material, such as ABS. A manifold can have a plate and gas passages ultrasonically welded together. By having at least one component made from a lightw... | 09/26/2006 |
| 7112059 | Apparatus and method for shutting down fuel fired appliance An apparatus is provided for controlling the operation of a gas fired appliance having a gas valve circuit for enabling the flow of gas to the burner. The apparatus comprises a sensor capable of detecting the presence of flammable vapor, a switching means in series ... | 09/26/2006 |
| 7096717 | Control device of gas sensor When the ignition switch of a vehicle is turned OFF, a purging process for increasing the flow of an off-gas fluidizing in each of the outlet side pipings of a fuel cell and discharging water remaining in a fuel cell system to an outside is started to be executed, a... | 08/29/2006 |
| 7056474 | Hydrocarbon sensor and collector A hydrocarbon sensor and collector. An element that is capable of absorbing and releasing hydrocarbons is positioned in the air intake system of a vehicle, upstream from the engine and wholly in the airflow. The element has a plurality of chambers defined in it that... | 06/06/2006 |
| 7041256 | Poison resistant combustible gas sensors and method for warning of poisoning A poison resistant combustible gas sensing element, a method for its production and a method for determining poisoning of the element. The element includes an electric heating element, an inner layer coated on the electric heating element and containing a precious m... | 05/09/2006 |
| 7012148 | Compositions and methods for thionation during chemical synthesis reactions Compositions and methods for using these compositions to produce high yields of thionated compounds are provided. ... | 03/14/2006 |
| 7007542 | Method of warning of poisoning in poison resistant combustible gas sensors A poison resistant combustible gas sensing element, a method for its production and a method for determining poisoning of the element. The element includes an electric heating element, an inner layer coated on the electric heating element and containing a precious m... | 03/07/2006 |
| 6993955 | Gas sensors Semiconductor gas sensors with improved selectivity to target gases are provided by having a semiconductor gas-sensing layer and a layer thereon of microporous ceramic oxide having catalytic activity. ... | 02/07/2006 |
| 6973819 | Differential compensated vapor sensor Vapor sensing systems and methods are disclosed. An appliance such as a gas water heater, clothes dryer, and the like can be associated with a controller for controlling the appliance. A vapor sensor is also associated with the appliance, such that the vapor sensor ... | 12/13/2005 |
| 6960476 | Method and apparatus for analyzing mixtures of gases Disclosed herein is a method and apparatus for analyzing, sensing and measuring the concentrations of various gases, including NOx, hydrocarbons, carbon monoxide and oxygen, in a multi-component gas system using chemical sensors and chemical sensor arrays... | 11/01/2005 |
| 6958689 | Multi-sensor fire detector with reduced false alarm performance A method of detecting a combustion chemical in a region and setting an alarm based on concentration levels of the combustion chemical comprises the steps of: monitoring the region for a combustion chemical with a sensor having a measurable parameter which changes in... | 10/25/2005 |
| 6916664 | Flammable vapor sensor A method and apparatus for sensing a flammable vapor are described herein. Initially, a first thermal conductivity of a vapor at a first temperature and a second thermal conductivity of the vapor at a second temperature can be determined. Thereafter, a ratio of the ... | 07/12/2005 |
| 6913731 | Oxygen probe Intended for application on ducts through which flow a fluid at a high temperature, and particularly at a high pressure, comprising two bodies (4) and (8) which axially screw onto each other, one body (4) provided with a threaded neck (5)... | 07/05/2005 |
| 6911180 | Catalytic sensor A combustible gas sensor includes an active element in electrical connection with a measurement circuit. The measurement circuit includes a thermistor network to compensate for the effect of changes in ambient temperature to the resistance of the active element. Ano... | 06/28/2005 |
| 6866819 | Sensor for detecting small concentrations of a target matter A sensor for detecting a target matter includes a chemical sensitive layer that is operable to react when exposed to the target matter and a piezoresistive material coupled to the chemical sensitive layer. The chemical sensitive layer is configured such that the rea... | 03/15/2005 |
| 6849239 | Method and apparatus for analyzing mixtures of gases Disclosed herein is a method and apparatus for analyzing, sensing and measuring information related to the concentrations of various gases, including NOx, hydrocarbons, carbon monoxide and oxygen, in a multi-component gas system using chemical sensors and... | 02/01/2005 |
| 6849238 | Measuring sensor for gases The measuring sensor, particularly a lambda probe, has a ceramic sensor member retained at a high temperature during measuring operation. It is shielded from water droplets, carried along in the gas to be analyzed, by a heated protective housing, permeable for the g... | 02/01/2005 |
| 6838287 | Fluid mixture composition sensor An improved, affordable, and rapid fluid mixture composition or process monitor based on a thermal microstructure sensor. This is preferably accomplished with a microbridge sensor design that has reduced susceptibility to interfering components of the mixture. The s... | 01/04/2005 |
| 6827903 | Inert gas fusion analyzer A single pass analyzer includes multiple infrared sensors, a catalytic converter, a scrubber and a thermal conductivity cell all coupled in series to provide a single pass (i.e., one sample) analyzer which allows for fast analysis, allows for the speciation of hydro... | 12/07/2004 |
| 6756016 | Gas sensor A gas sensor for the detection of gases comprises a housing and an active element disposed within the housing. The active element is surrounded by a porous insulating material having a bulk density no greater than 0.15 g/cc. Another gas sensor comprises an active el... | 06/29/2004 |
| 6719950 | Miniaturized exhaust gas sensor An exhaust gas sensor includes a housing and a sensor element supported by the housing. The sensor element includes a support member having an exhaust side, a reference side, and an aperture extending through the support member between the exhaust side and the refer... | 04/13/2004 |
| 6663834 | Catalytic sensor A combustible gas sensor includes an active element in electrical connection with a measurement circuit. The measurement circuit includes a thermistor network to compensate for the effect of changes in ambient temperature to the resistance of the active e... | 12/16/2003 |
| 6565812 | Gas sensor and method for producing it A base is provided with a concave and three leads, and the central lead is bent to the side opposite to the concave, and the other leads are bent to the side of the concave. A central electrode of a sensor element is attached to the central lead and the b... | 05/20/2003 |
| 6419880 | Systems and methods for catalyst reactivation The invention includes systems and methods which allow reactivation of supported noble metal catalysts. The method involves heating the catalyst in the presence of a gaseous hydrocarbon in the absence of oxidizing agents. Systems of the invention provide ... | 07/16/2002 |
| 6346420 | Method of analyzing a gas mixture to determine its explosibility and system for implementing a method of this kind In this method of analyzing a gas mixture containing at least one inflammable gas to determine its explosibility, a resistive heating element (15) is energized in an analysis enclosure (12) communicating with the gas mixture to be analysed to burn the gas... | 02/12/2002 |
| 6117393 | Multilayered gas sensor A multilayered gas sensor for detecting the presence of gases in air. In particular, sensors are described for sensing hydrocarbons and nitrogen oxides. An additional feature of the invention is to provide a device that is suitable for sensing gases in th... | 09/12/2000 |
| 6074882 | Device determining a concentration of a gas mixture In order to determine a concentration of a gas mixture, especially a hydrogen concentration of a containment atmosphere of a nuclear power station, a temperature change resulting from a catalytic reaction is measured. The gas mixture is diluted with a mot... | 06/13/2000 |
| 6060025 | Systems and methods for catalyst reactivation The invention includes systems and methods which allow reactivation of supported noble metal catalysts. The method involves heating the catalyst in the presence of a gaseous hydrocarbon in the absence of oxidizing agents. Systems of the invention provide ... | 05/09/2000 |
| 5918260 | Gas sensor with multi-level sensitivity circuitry A combustible gas detector or sensors having a multi-level sensitivity circuitry. The gas detector has a bridge circuit for outputing voltages indicative of gas concentrations contacting the bridge circuit. There is a power supply node electrically couple... | 06/29/1999 |
