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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 8052932 | Polymer nanofiber-based electronic nose A chemical sensor and a system and method for sensing a chemical species. The chemical sensor includes a plurality of nanofibers whose electrical impedance varies upon exposure to the chemical species, a substrate supporting and electrically isolating the fibers, an... | 11/08/2011 |
| 7442555 | Ammonia gas sensor method and device A mixed potential sensor device and methods for measuring total ammonia (NH3) concentration in a gas is provided. The gas is first partitioned into two streams directed into two sensing chambers. Each gas stream is conditioned by a specific catalyst syste... | 10/28/2008 |
| 7422723 | Alcohol breath test device A breath alcohol detection device includes a one-piece multi-passage block with attached sensors, a valve and a fuel cell. The cell accurately determines the BrAC of a prospective vehicle operator. In the event the BrAC is less than the legal maximum for a territory... | 09/09/2008 |
| 7393505 | Proton conductor gas sensor A proton conductor gas sensor whose durability at high temperature is enhanced by using gel not converted to sol even at high temperature in a water reservoir. Fine particles of silica are gelled by adding water thereto and agitating the mixture under shear force. T... | 07/01/2008 |
| 7360395 | Gas sensor A gas sensor which includes walls delimiting a gas detection chamber, and having an introduction port (or an inlet) through which an observed gas is introduced into the gas detection chamber, a measuring element disposed in the gas detection chamber and measuring co... | 04/22/2008 |
| 7362605 | Nanoelectromechanical memory cells and data storage devices Nanoelectromechanical (NEM) memory cells are provided by anchoring a conductive nanometer-scale beam (e.g., a nanotube) to a base and allowing a portion of the beam to move. A charge containment layer is provided in the vicinity of this free-moving portion. To read ... | 04/22/2008 |
| 7347974 | Materials, method and apparatus for detection and monitoring of chemical species A method for investigating a target environment to determine whether or in what amount a chemical species may be present therein, which comprises: (a) exposing to said environment an article of manufacture comprising a multiplicity of particles in close-packed orien... | 03/25/2008 |
| 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 |
| 7329308 | Air handling and chemical filtration system and method The present invention relates to systems and methods for controlling humidity and temperature in gases or air streams used in semiconductor processing systems. These systems and methods can be used in combination with systems and methods for contaminant detection an... | 02/12/2008 |
| 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 |
| 7323343 | Nitrogen monoxide, nitrogen dioxide and ozone determination in air An analytical system is provided for determining nitrogen monoxide, nitrogen dioxide and ozone concentrations in air samples. An ultraviolet light source 4 is used to alter the equilibrium between nitrogen dioxide and oxygen on the one hand and nitrogen monox... | 01/29/2008 |
| 7297312 | Simultaneous multianalyte electrochemical assay based on spatial resolution A simultaneous multianalyte electrochemical assay includes a cell which has a surface and the surface includes analyte binding sites i.e., antibodies or antigens on a solid phase at distinct separate locations. Separate working electrodes are located within proximit... | 11/20/2007 |
| 7294252 | NOx sensor and methods of using the same Disclosed herein are NOx sensors and methods of using the same. In one embodiment, a method for sensing NOx comprises: contacting a first NOx electrode with the gas, contacting a second NOx electrode with the gas, determining a NO2 emf between the first N... | 11/13/2007 |
| 7289230 | Wireless substrate-like sensor A wireless substrate-like sensor is provided to facilitate alignment and calibration of semiconductor processing systems. The wireless substrate-like sensor includes an optical image acquisition system that acquires one or more images of targets placed within the se... | 10/30/2007 |
| 7283255 | Wireless substrate-like sensor A wireless substrate-like sensor is provided to facilitate alignment and calibration of semiconductor processing systems. The wireless substrate-like sensor includes an optical image acquisition system that acquires one or more images of targets placed within the se... | 10/16/2007 |
| 7269962 | Cooling medium compressor arrangement A cooling medium compressor arrangement is comprised of a compressor, a control mechanism electrically connected with the compressor, and a gas sensor, and the safety of the arrangement is improved by arranging the control mechanism and the gas sensor in a common ho... | 09/18/2007 |
| 7233034 | Hydrogen permeable protective coating for a catalytic surface A protective coating for a surface comprising a layer permeable to hydrogen, said coating being deposited on a catalyst layer; wherein the catalytic activity of the catalyst layer is preserved. ... | 06/19/2007 |
| 7201874 | System for automatically extracting and analyzing residual solvents in material samples A system for quickly and automatically extracting and analysing residual solvents is realised for operating directly in the premises where the packing materials are being manufactured, printed and/or laminated. The system provides for a single unit equipped w... | 04/10/2007 |
| 7199498 | Electrical assemblies using molecular-scale electrically conductive and mechanically flexible beams and methods for application of same Electromechanical systems utilizing suspended conducting nanometer-scale beams are provided and may be used in applications, such as, motors, generators, pumps, fans, compressors, propulsion systems, transmitters, receivers, heat engines, heat pumps, magnetic field ... | 04/03/2007 |
| 7193178 | Method and apparatus for controlling the heating of an oxygen sensor in a motor vehicle Methods and apparatus are provided for controlling the heating of an oxygen sensor in a motor vehicle. The apparatus comprises an oxygen sensor for measuring oxygen levels in exhaust gases of a motor vehicle. The oxygen sensor comprising a heater rod, an outer elect... | 03/20/2007 |
| 7189364 | Hydrogen sensor A hydrogen sensor includes a first electrode 3 and a second electrode 4 provided in contact with a proton conduction layer 2; a gas diffusion controlling portion 6 provided between a measurement gas atmosphere and the first electrode 3... | 03/13/2007 |
| 7174768 | Hydrogen sensor, apparatus for measuring hydrogen concentration, and method for measuring hydrogen concentration A hydrogen sensor includes a hydrogen-absorbing material, a thermoelectric element, an electrical circuit for driving the thermoelectric element, a thermometer for the hydrogen-absorbing material, a temperature control circuit for maintaining the hydrogen-absorbing ... | 02/13/2007 |
| 7175885 | Compositionally different polymer-based sensor elements and methods for preparing same The present invention provides a combinatorial approach for preparing arrays of chemically sensitive polymer-based sensors which are capable of detecting the presence of a chemical analyte in a fluid in contact therewith. The described methods and devices comprise c... | 02/13/2007 |
| 7128818 | Method and apparatus for monitoring gases in a combustion system A method and apparatus for monitoring and measuring gas concentrations in combustor applications is provided, wherein the apparatus is a gas sensor having a plurality of electrodes cooperating with a single electrolyte cell for detecting the presence and concentrati... | 10/31/2006 |
| 7117718 | Device for ascertaining a particle concentration in an exhaust gas flow A device for ascertaining a particle concentration in an exhaust gas flow of a combustion device, particularly a diesel combustion device, is provided, which device ascertains very small particle concentrations in the exhaust gas of combustion devices, accompanied b... | 10/10/2006 |
| 7104111 | Formation of metal nanowires for use as variable-range hydrogen sensors The present invention provides for variable-range hydrogen sensors and methods for making same. Such variable-range hydrogen sensors comprise a series of fabricated Pd—Ag (palladium-silver) nanowires—each wire of the series having a different Ag to Pd ratio—wi... | 09/12/2006 |
| 7095645 | Nanoelectromechanical memory cells and data storage devices Nanoelectromechanical (NEM) memory cells are provided by anchoring a conductive nanometer-scale beam (e.g., a nanotube) to a base and allowing a portion of the beam to move. A charge containment layer is provided in the vicinity of this free-moving portion. To read ... | 08/22/2006 |
| 7090808 | Apparatus for testing sterilization methods and materials Apparatus and method for testing one or more sterilization indicators (e.g., biological indicators or chemical indicators) or other articles by contacting them under controlled sterilization conditions with a flowing antimicrobial gas containing hydrogen peroxide va... | 08/15/2006 |
| 7079998 | Method for analyzing power noise and method for reducing the same A method for analyzing power noise and method for reducing the same are disclosed, wherein the present invention is utilized in an IC design process. First, a DC analysis is performed with a related IC design by utilizing computer aided design (CAD) software and cir... | 07/18/2006 |
| 7069770 | Ammonia sensor element, heater, and method for making the same A sensor element can comprise a co-fired heater section, a sensing section, and a third insulating layer disposed between the electrode portion and the temperature sensor. The heater section can comprise a heater, a shield, and a temperature sensor, with a first ins... | 07/04/2006 |
| 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 |
| 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 |
| 6948353 | Quick response structure of gas sensor A protective cover assembly of a gas sensor which is made up of an inner and an outer cover. The inner cover is disposed within the outer cover coaxially through a given clearance. The dimension of the clearance is defined within a range suitable for improving the r... | 09/27/2005 |
| 6948388 | Wireless remote sensor A sensing system includes a ring oscillator that emits electromagnetic radiation at a characteristic frequency. The ring oscillator comprises an odd number plurality of inverters that are electrically connected in series. The sensing system also comprises a temperat... | 09/27/2005 |
| 6933151 | Diagnostic system for monitoring catalyst performance A diagnostic system for monitoring catalyst performance in an exhaust system comprises a plurality of treatment devices catalytically treating an exhaust gas stream, and a plurality of gas sensors for monitoring the catalyst performance of the treatment devices to d... | 08/23/2005 |
| 6927067 | Detection devices, methods and systems for gas phase materials Sensor arrays, methods, and systems for detecting the presence of gas phase materials by the formation of films based on the gas phase material are disclosed. The gas phase materials preferentially deposit conductive films on receptor materials that can be detected.... | 08/09/2005 |
| 6927066 | Process for the determination of MTBE in the ground and air A process is described, and also the system for its embodiment, for the determination of pollution by MTBE in the soil and in the overlying atmosphere. An example is described relating to the monitoring of underground fuel tanks for autotraction containing an oxygen... | 08/09/2005 |
| 6908770 | Fluid based analysis of multiple analytes by a sensor array A system for the rapid characterization of multi-analyte fluids, in one embodiment, includes a light source, a sensor array, and a detector. The sensor array is formed from a supporting member into which a plurality of cavities may be formed. A series of chemically ... | 06/21/2005 |
| 6905655 | Modification of selectivity for sensing for nanostructure device arrays An electronic system for selectively detecting and identifying a plurality of chemical species, which comprises an array of nanostructure sensing devices, is disclosed. Within the array, there are at least two different selectivities for sensing among the nanostruct... | 06/14/2005 |
| 6897070 | Detection of gas phase materials Sensors and methods of monitoring for the presence of gas phase materials by detecting the formation of films based on the gas phase material are disclosed. Advantageously, some gas phase materials preferentially deposit on specific surfaces. As a result, selective ... | 05/24/2005 |
