Carbon Monoxide Only Patents (Class 436/134)
  • Patent number: 10495592
    Abstract: Provided are processes for the sensitive detection of the presence of, absence of, and optionally the identity of, one or more chemical agents. The processes use the binding of chemical agents to a metal organic framework or metal oxide/hydroxide electrically connected to a pair of electrodes to detect low levels of chemical in a sample. By exposing the surface of the metal organic framework or the surface of the metal oxide/hydroxide to the chemicals and then measuring changes in impedance magnitude and/or phase shift through electrical impedance spectroscopy, the presence of a chemical agent is readily detected.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: December 3, 2019
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Gregory W Peterson, Augustus W Fountain, III, Jennifer R Soliz, Adam J Hauser
  • Patent number: 10054534
    Abstract: Systems and methods batch calibrate environmental sensors. Candidate environmental sensors and a high-performance reference sensor are located in an enclosure with a particle excitation system that controls the particle concentration in the enclosure. The calibration process includes multiple phases with different particle concentrations, and the candidate and reference sensors continuously report their particle counts to a calibration server during these phases. Based on the collected data, the calibration server: (i) identifies for removal candidate sensors with outlying behavior through statistical analysis; and (ii) computes calibration values for the particle count estimation algorithms for the remaining candidate sensors that are optimized to minimize the error relative to the reference sensor(s).
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: August 21, 2018
    Assignee: Airviz Inc.
    Inventors: Illah Nourbakhsh, Joshua Schapiro, Michael D. Taylor
  • Patent number: 9575042
    Abstract: Provided is an organic ligand-bound metal surface that selects one gaseous species over another. The species can be closely sized molecular species having less than 1 Angstrom difference in kinetic diameter. In one embodiment, the species comprise carbon monoxide and ethylene. Such organic ligand-bound metal surfaces can be successfully used in gas phase separations or purifications, sensing, and in catalysis.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: February 21, 2017
    Assignee: The Regents of the University of California
    Inventors: Alexander Okrut, Xiaoying Ouyang, Ron Runnebaum, Bruce C. Gates, Alexander Katz
  • Patent number: 9310346
    Abstract: A gas sample storage chamber is used to continuously acquire a gas sample. After the sample has been acquired, the stored gas in the chamber can be analyzed. This analysis can provide a time history of the gas sample, since mixing and diffusion of the gas sample in the chamber can be made sufficiently negligible. The gas flow rate for analysis differs significantly from the acquisition flow rate.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: April 12, 2016
    Assignee: Picarro, Inc.
    Inventors: Chris W. Rella, Pieter P. Tans
  • Publication number: 20150132857
    Abstract: A device for detecting airborne contaminants includes a protonated, electrically conductive sensing material with affinity for binding with, and capable of being deprotonated by, the airborne contaminant. Electronics measure a property of the sensing material that is sensitive to deprotonation and generates signals indicative of the airborne contaminant. A method for detecting airborne contaminants includes: determining a property change of the protonated, electrically conductive material; and determining presence of the airborne contaminant based on the change.
    Type: Application
    Filed: June 13, 2013
    Publication date: May 14, 2015
    Inventors: Joseph J. Belbruno, Susanne E. Tanski
  • Publication number: 20140356973
    Abstract: Provided is an organic ligand-bound metal surface that selects one gaseous species over another. The species can be closely sized molecular species having less than 1 Angstrom difference in kinetic diameter. In one embodiment, the species comprise carbon monoxide and ethylene. Such organic ligand-bound metal surfaces can be successfully used in gas phase separations or purifications, sensing, and in catalysis.
    Type: Application
    Filed: May 30, 2014
    Publication date: December 4, 2014
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Alexander OKRUT, Xiaoying OUYANG, Ron RUNNEBAUM, Bruce C. GATES, Alexander KATZ
  • Patent number: 8871519
    Abstract: The present invention relates to methods for qualifying material for using in the cleaning of alkylene oxide equipment. Qualified material is not expected to contribute to the formation of determinable amounts of alkylene oxide by-products. Methods of cleaning alkylene oxide equipment, and alkylene oxide processes incorporating these methods are also provided.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: October 28, 2014
    Assignee: Dow Technology Investments LLC
    Inventor: Paul Victor Hinman
  • Patent number: 8828733
    Abstract: The compositions and methods relate to an organic polymer-inorganic particle sensor material for detecting analytes. Interactions between the polymer and the particles are affected by the presence of analyte, which displaces the polymer and increases its free volume. This change in free volume can be detected, e.g., using an embedded piezoresistive microcantilever (EPM) sensor. Analytes that can be detected include noxious substances, such as hydrogen cyanide gas and carbon monoxide.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: September 9, 2014
    Assignees: Cantimer, Inc., Arizona Board Of Regents For And On Behalf Of Northern Arizona University
    Inventors: Timothy L. Porter, Ray Stewart, Timothy L. Vail
  • Patent number: 8778413
    Abstract: The present invention is directed to dosing regimens for the administration of carbon monoxide in the treatment of various indications as well as methods for enhancing organ function following transplant thereof.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: July 15, 2014
    Assignee: Ikaria, Inc.
    Inventors: Helen H. Usansky, Khurram Jamil
  • Patent number: 8586383
    Abstract: The invention relates to a device (10) for detection of harmful substances with a measurement unit (28) for measuring at least one harmful substance and an evaluation unit (30) for determining the concentration of the at least one harmful substance. The invention also relates to a method for detecting harmful substances in a gas mixture. It is hereby provided that the gas mixture is tested for a gaseous harmful substance or simultaneously for several gaseous harmful substances, wherein the gaseous harmful substance or the gaseous harmful substances is/are measured with different sensor means, and the gaseous harmful substances are optionally chemically modified such that a measurement is performed with the existing sensor means.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: November 19, 2013
    Assignee: Airsense Analytics
    Inventors: Andreas Walte, Wolf Münchmeyer
  • Publication number: 20130224872
    Abstract: The present disclosure relates to a gas sensor, including: a gas collecting chamber including: (a) a nanoporous wall including alumina, on a portion of the gas collecting chamber in the near vicinity of the solid propellant fuel; a micro pump attached to the gas collecting chamber; and a gas analysis device connected to the gas collecting chamber. The gas analysis device measures both type and concentration of gases collected in the gas collecting chamber via the nanoporous wall, the gases measured being selected from the group consisting of CO, CO2, NO, N2O, NO2 and combinations thereof. The present disclosure also relates to a method of sensing propellant degradation in solid fuel and a method of using a gas collecting chamber to sense such degradation.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 29, 2013
    Applicant: United States of America as represented by the Secretary of the Army
    Inventors: Christina L. Brantley, Eugene Edwards, Paul B. Ruffin, Fang Luo
  • Patent number: 8435448
    Abstract: An assembly and method for gas analysis. The assembly comprises a catalyst compartment for catalytically reacting a component of a gas sample, producing one or more gas species as products. A product compartment receives the gas species, and a sensing element within the compartment senses the amount of one or more of the gas species. This amount is compared to the amount of the same gas species present in a reference compartment containing a non-catalyzed gas sample, providing the amount of the gas species produced by catalysis. Using this value, the content of the gas component in the gas sample is calculated based upon the stoichiometry of the catalyzed reaction. In preferred embodiments, the gas for analysis is a process gas for fuel production, and the catalyst is a high temperature shift catalyst that catalyzes the reaction of carbon monoxide and water into hydrogen and carbon dioxide.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: May 7, 2013
    Assignee: The Regents of the University of California
    Inventors: Chan Seung Park, Colin E. Hackett, Joseph M. Norbeck
  • Patent number: 8415166
    Abstract: The present invention provides a device for the detection of a peroxide-based explosive, in particular, triacetone triperoxide (TATP), which is based on a molecular controlled semiconductor resistor (MOCSER) and composed of at least one insulating or semi-insulating layer, at least one conducting semiconductor layer, two conducting pads and a layer of multifunctional organic molecules capable of adsorbing molecules of the peroxide-based explosive. The invention further provides an array of semiconductor devices for the selective detection of a peroxide-based explosive, as well as a method for the selective detection of vapors of a peroxide-based explosive in a gaseous mixture using this array.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: April 9, 2013
    Assignee: Yeda Research and Development Co. Ltd.
    Inventors: Ron Naaman, Eyal Capua, Roberto Cao
  • Publication number: 20130005045
    Abstract: A chemochromic sensor for detecting a combustible gas, such as hydrogen, includes a chemochromic pigment mechanically mixed with a polymer and molded into a rigid or pliable shape. In a preferred embodiment, the chemochromic detector is within the material which is molded into a manufactured part, said part becoming the detector itself. The detector is robust and easily modifiable for a variety of applications and environmental conditions, such as atmospheres of inert gas, hydrogen gas, or mixtures of gases, or in environments that have variable temperature, including high temperatures such as above 100° C. and low temperatures such as below ?196° C.
    Type: Application
    Filed: September 12, 2012
    Publication date: January 3, 2013
    Applicants: Space
    Inventors: Janine E. Captain, Luke B. Roberson, Martha K. Williams, Trent M. Smith, LaNetra Clayton Tate
  • Patent number: 8298484
    Abstract: The present invention relates to an analyzer (1) which includes a placement part (11) for placing an analysis piece, and a photometric measurer (7) for photometric measurement of the analysis piece (2). In the analyzer (1), the placement part (11) holds the analysis piece (2) in such a way that a row of reagent pad (20) on the analysis piece (1) lie in right-and-left directions (D3, D4). The photometric measurer (7) is farther from a front than the placement part (11). The analysis piece (2) placed on the placement part (11) is conveyed from front toward rear (Direction D1), with the row of reagent pads (20) laid in right-and-left directions (D3, D4), toward the photometric measurer (7).
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: October 30, 2012
    Assignee: ARKRAY, Inc.
    Inventors: Yasumitsu Takagi, Hisakazu Sugie, Toshiyuki Otsuki, Norimasa Nishida, Yoshikiyo Hongo
  • Publication number: 20120171713
    Abstract: A semiconductor die includes a chemical sensor, a digital to analog converter, and microcontroller formed therein. The chemical sensor detects the presence of a chemical and outputs an analog signal to the digital to analog converter. The analog to digital converter converts the analog signal to a digital signal. The analog to digital converter outputs the digital signal to the microcontroller. Microcontroller calculates a value of the concentration of the selected chemical.
    Type: Application
    Filed: October 31, 2011
    Publication date: July 5, 2012
    Applicant: STMICROELECTRONICS PTE LTD.
    Inventors: Suman Cherian, Olivier Le Neel
  • Publication number: 20120164738
    Abstract: The invention relates to methods and compositions for the rapid detection of small ligands, such as cyanide, carbon monoxide or azide, in small quantities. Specifically, metmyoglobin is used to bind small ligands which yield a product with a characteristic absorbance spectrum that is detectable and quantifiable. Also disclosed is a kit for detecting small ligands with metmyoglobin, which is portable and provides for practice of the invention without the use of harsh solvents or chemical reagents.
    Type: Application
    Filed: May 5, 2008
    Publication date: June 28, 2012
    Applicant: U.S. ARMY MEDICAL RESEARCH AND MATERIEL COMMAND
    Inventors: James B. Kelly, Fred M. Hawkridge, Steven I. Baskin, Matthew G. Clark, Scott Willens
  • Publication number: 20120070903
    Abstract: A method for measuring the real hot-spot temperature in an electric apparatus containing an oil, such as an electric power transformer. The electric apparatus is operated under predetermined and modifiable operating conditions. This method comprises the use of one or several chemical compounds or tracers present and soluble in the oil. Each tracer may transform, at a given temperature, in order to form a residue, such as a soluble gas. From the presence of the residue in the oil, the operator will be able to determine under which predetermined operating condition the hot-spot has been reached and to deduce the hot-spot for a given condition. Among different used compounds, there are diazoic compounds, carbonyl metals, colorants, pigments, liquid crystals and albumins. The method also allows to check the quality of the apparatus on the market and to estimate its life span.
    Type: Application
    Filed: February 5, 2009
    Publication date: March 22, 2012
    Applicant: HYDRO-QUEBEC
    Inventors: Pierre Couture, Michel Duval
  • Patent number: 8114675
    Abstract: Described are CO sensors, methods for making the CO sensors, and methods for using the CO sensors. An exemplary CO sensor includes a ruthenium oxide present in a form having one or more surfaces, a pair of conductive electrodes operatively connected to a surface of the ruthenium oxide, and an electrical device operatively connected to the pair of conductive electrodes. The gas mixture contacts at least one surface of the ruthenium oxide during operation of the sensor and the electrical device applies a constant potential (or current) and measures a current (or potential) between the pair of conductive electrodes, from which a resistance can be derived as the gas mixture contacts at least one surface of the ruthenium oxide. The ruthenium oxide may have varying levels of hydration. Furthermore, the sensor operates at a temperature range of from about 25° C. to about 300° C.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: February 14, 2012
    Assignee: The Ohio State University Research Foundation
    Inventors: Prabir K. Dutta, Adedunni D. Adeyemo
  • Publication number: 20110281367
    Abstract: The invention relates to a device (10) for detection of harmful substances with a measurement unit (28) for measuring at least one harmful substance and an evaluation unit (30) for determining the concentration of the at least one harmful substance. The invention also relates to a method for detecting harmful substances in a gas mixture. It is hereby provided that the gas mixture is tested for a gaseous harmful substance or simultaneously for several gaseous harmful substances, wherein the gaseous harmful substance or the gaseous harmful substances is/are measured with different sensor means, and the gaseous harmful substances are optionally chemically modified such that a measurement is performed with the existing sensor means.
    Type: Application
    Filed: May 13, 2011
    Publication date: November 17, 2011
    Applicant: Airsense Analytics GmbH
    Inventors: Andreas WALTE, Wolf MÜNCHMEYER
  • Publication number: 20110244585
    Abstract: A device is disclosed for detecting at least one chemical compound comprising at least one carbon nanotube with several graphene layers, on which is grafted at least one molecule bearing group G1 capable of reacting with the chemical compound or a precursor of such a group G1. The uses and the method of making such a device is also disclosed.
    Type: Application
    Filed: September 28, 2009
    Publication date: October 6, 2011
    Applicant: Commissariat a l'energie atomique et aux energies alternatives
    Inventors: Martine Mayne-L'Hermite, Serge Palacin, Pascale Chenevier, Jérôme Chancolon, Aurélien Gohier
  • Publication number: 20110171066
    Abstract: A chemochromic sensor for detecting a combustible gas, such as hydrogen, includes a chemochromic pigment mechanically mixed with a polymer and formed into a rigid or pliable material. In a preferred embodiment, the chemochromic detector includes aerogel material. The detector is robust and easily modifiable for a variety of applications and environmental conditions, such as atmospheres of inert gas, hydrogen gas, or mixtures of gases, or in environments that have variable temperature, including high temperatures such as above 100° C. and low temperatures such as below ?196° C.
    Type: Application
    Filed: November 6, 2007
    Publication date: July 14, 2011
    Applicants: Space Administration
    Inventors: Janine E. Captain, Luke B. Roberson, Martha K. Williams, Trent M. Smith, LaNetra Clayton Tate
  • Patent number: 7867766
    Abstract: An apparatus and method are disclosed for measuring the kinetic parameters of a catalyst powder, which include the reaction rate constants, active site concentration and intraparticle diffusivity. The measurement of the active site concentration selectively measures just the active sites and not the entire exposed atom concentration. The apparatus and method use surface concentrations less than 50% and larger than 1% the total active site concentration and a dynamic pulsed flow to avoid including weak adsorption sites not involved in the catalysis. The measurement is more accurate because (1) it uses a reactant gas and non-steady state adsorption at temperatures near to reaction temperatures, and (2) it uses the chemical kinetics expressions to extract the measured active site concentration to perform the measurement so as to count just those sites actually active for that reactant.
    Type: Grant
    Filed: February 11, 2007
    Date of Patent: January 11, 2011
    Inventor: Dezheng Wang
  • Patent number: 7864322
    Abstract: A method for detecting a gas phase constituent such as carbon monoxide, nitrogen dioxide, hydrogen, or hydrocarbons in a gas comprising oxygen such as air, includes providing a sensing material or film having a metal embedded in a catalytically active matrix such as gold embedded in a yttria stabilized zirconia (YSZ) matrix. The method may include annealing the sensing material at about 900° C., exposing the sensing material and gas to a temperature above 400° C., projecting light onto the sensing material, and detecting a change in the absorption spectrum of the sensing material due to the exposure of the sensing material to the gas in air at the temperature which causes a chemical reaction in the sensing material compared to the absorption spectrum of the sensing material in the absence of the gas. Systems employing such a method are also disclosed.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: January 4, 2011
    Assignee: The Research Foundation of State University of New York
    Inventors: Michael A. Carpenter, George Sirinakis
  • Publication number: 20100203648
    Abstract: The compositions and methods relate to an organic polymer-inorganic particle sensor material for detecting analytes. Interactions between the polymer and the particles are affected by the presence of analyte, which displaces the polymer and increases its free volume. This change in free volume can be detected, e.g., using an embedded piezoresistive microcantilever (EPM) sensor. Analytes that can be detected include noxious substances, such as hydrogen cyanide gas and carbon monoxide.
    Type: Application
    Filed: January 18, 2008
    Publication date: August 12, 2010
    Inventors: Timothy L. Porter, Ray Stewart, Timothy L. Vail, Michael P. Eastman
  • Patent number: 7772004
    Abstract: The invention relates to a method allowing to determine at least one petroleum characteristic of a geologic sediment sample, wherein the sample is heated in an oxidizing atmosphere, its temperature being successively raised to a first, then to a second value, said first value below 200° C. being reached very quickly, then maintained substantially constant for a certain time, said second value ranging between 600° C. and 850° C. being reached with a temperature gradient ranging between 1 and 30° C./min, from said first value. According to the invention, the amount of SO2 contained by the effluent resulting from said oxidizing heating is measured continuously, every moment of the heating period of said sample.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: August 10, 2010
    Assignee: Institut Francais du Petrole
    Inventor: François Lorant
  • Patent number: 7754491
    Abstract: An assembly and method for gas analysis. The assembly comprises a catalyst compartment for catalytically reacting a component of a gas sample, producing one or more gas species as products. A product compartment receives the gas species, and a sensing element within the compartment senses the amount of one or more of the gas species. This amount is compared to the amount of the same gas species present in a reference compartment containing a non-catalyzed gas sample, providing the amount of the gas species produced by catalysis. Using this value, the content of the gas component in the gas sample is calculated based upon the stoichiometry of the catalyzed reaction. In preferred embodiments, the gas for analysis is a process gas for fuel production, and the catalyst is a high temperature shift catalyst that catalyzes the reaction of carbon monoxide and water into hydrogen and carbon dioxide.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: July 13, 2010
    Assignee: The Regents of the University of Calif.
    Inventors: Chan Seung Park, Colin E. Hackett, Nora A. Hackett, legal representative, Joseph M. Norbeck
  • Patent number: 7749762
    Abstract: A method for testing the performance of catalysts used for conversion of FCC regenerator gases comprises subjecting the catalyst simultaneously to a mixture of gases including an oxidizing gas and a reducing gas in more than one cycle in which the ratio of the oxidizing gas to the reducing gas varies over the time of the cycle. Test gases comprising O2, CO, CO2, steam, nitrogen-containing gases and sulfur-containing gases in which the ratio of O2 to CO varies over time for each cycle and in which the products of combustion formed during each cycle can be measured periodically over the cycle yields important data on the usefulness of the catalysts for treatment of regenerator flue gas.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: July 6, 2010
    Assignee: BASF Catalysts LLC
    Inventor: David Matheson Stockwell
  • Patent number: 7740803
    Abstract: The thermoelastic response of certain materials to an incident electromagnetic excitation beam is highly sensitive to physical conditions existing at the surface of the material. Probe structures carrying probe materials are used as sensors in the analysis and investigation of biochemical molecules. Each probe structure is adapted to undergo a thermoelastic response when excited by temporally varying electromagnetic radiation, characteristics of the thermoelastic response being a function of physical properties of material binding to the surface of the probe structure. An electromagnetic excitation means directs electromagnetic energy at a selected one of the probe structures in order to elicit the excitation response. A detection means determines change in excitation response of the probe structures resulting from the binding of molecules thereto.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: June 22, 2010
    Assignee: Sonoptix (UK) Limited
    Inventor: Hayat Sindi
  • Publication number: 20080206882
    Abstract: Apparatus and method for determining incomplete combustion in a combustion analyzer comprising a combustion chamber (60). A sample is supplied to the combustion chamber and combusted to produce combustion products. A target gas characteristic of incomplete combustion of the sample is detected in the combustion products by a target gas sensor (72). The target gas may be carbon monoxide, methane, methanal and/or methanol, among others. Preferably, the gas sensor is an electronic or catalytic combustible gas sensor. Whether incomplete combustion of the sample has occurred may be determined. A signal indicative of incomplete combustion is output from the target gas sensor to a controller (78). The combustion products can be directed to waste and/or further supply of the sample/oxygen may be stopped/adjusted. Faulty analysis measurements and/or contamination of downstream components, which would otherwise result from incomplete combustion—in particular, from soot formation—can thereby be avoided.
    Type: Application
    Filed: February 26, 2008
    Publication date: August 28, 2008
    Applicant: THERMO FISHER SCIENTIFIC INC.
    Inventors: Louis Marie SMEETS, Maurice Stephan VAN DOESELAAR, David Marco Gertruda ALBERTI
  • Patent number: 7297549
    Abstract: 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 comprises removing water from the sample gas flow and cooling the sample gas flow to a temperature below about 41° F. to produce a cooled, dried sample gas flow. The constituent concentration level is then determined for the cooled, dried sample gas flow. The method further comprises introducing a span gas having a known span gas constituent concentration level into the sample gas flow to form a combined sample and span gas flow, the span gas being introduced at a desired span gas flow rate. The method still further comprises removing water from the combined sample and span gas and cooling the combined sample and span gas to a temperature below about 41° F. to produce a cooled, dried, combined sample and span gas flow.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: November 20, 2007
    Assignee: General Electric Company
    Inventors: William Steven Lanier, Glenn England
  • Patent number: 7264778
    Abstract: Carbon monoxide sensors suitable for use in hydrogen feed streams and methods of use thereof are disclosed. The sensors are palladium metal/insulator/semiconductor (Pd-MIS) sensors which may possess a gate metal layer having uniform, Type 1, or non-uniform, Type 2, film morphology. Type 1 sensors display an increased sensor response in the presence of carbon monoxide while Type 2 sensors display a decreased response to carbon monoxide. The methods and sensors disclosed herein are particularly suitable for use in proton exchange membrane fuel cells (PEMFCs).
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: September 4, 2007
    Assignee: Sandia Corporation
    Inventors: Anthony H. McDaniel, J. Will Medlin, Robert J. Bastasz
  • Patent number: 7067323
    Abstract: A system and method for nondestructive automated headspace analysis. The system includes a container conveyor that conveys a plurality of generally optically transparent sealed test containers through a pre-inspection region, an inspection region and a post-inspection region of the container conveyor, and that conveys at least one sealed reference container, through the inspection region. Also included is a zone including a laser emitter and a sensor located in the inspection region and arranged such that the laser source emits a laser beam such that it intersects with a container movement path. The conveyor alternatingly conveys test containers and reference containers through the zone.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: June 27, 2006
    Assignee: Lighthouse Instruments, LLC
    Inventors: James R. Veale, William R. Anderson, Warren M. Griffith, Glenn E. Edwards, George R. Howard
  • Patent number: 7029920
    Abstract: A method and system for determining a concentration level of NOx in an exhaust stream from a combustion source. The method comprises capturing sample gas from the exhaust stream using a sampling device. NO2 in the sample gas is converted to NO by passing the sample gas through a catalytic NO2 converter. The method also comprises removing water from the sample gas by passing the sample gas through a dryer and determining a sample gas NO concentration level. The step of converting NO2 is performed at a temperature above the dew point temperature of the sample gas.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: April 18, 2006
    Assignee: General Electric Company
    Inventors: William Steven Lanier, Glenn England
  • Patent number: 6827903
    Abstract: 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 hydrogen samples, requires no purging between different sample types, utilizes a single carrier gas, and eliminates molecular sieves and Shutze converters. The resultant analyzer provides improved quicker results with less plumbing (i.e., gas conduits and valving) in a single instrument.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: December 7, 2004
    Assignee: Leco Corporation
    Inventor: Carlos Guerra
  • Patent number: 6780378
    Abstract: A method and apparatus for measuring the concentration of at least one gaseous component and/or vaporous component of a gaseous mixture in which a controlled sensor flame is introduced into the gaseous mixture and at least one narrow spectral band in the controlled sensor flame is optically measured. The concentration of the gaseous component using a result obtained from the optical measuring of the at least one narrow spectral band is then calculated. The method of this invention is particularly suitable for substantially real-time control of combustion processes.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: August 24, 2004
    Assignee: Gas Technology Institute
    Inventors: Hamid A. Abbasi, David M. Rue
  • Patent number: 6720171
    Abstract: A process for preparing arrays of two or more heterogeneous catalysts, heterogeneous catalyst precursors, or combinations thereof in a body having preferably parallel through-channels. In this process, a solution, emulsion or dispersion of elements present in the catalyst, catalyst precursor, or combination thereof, is first prepared, and is used to simultaneously or successively coat the channels of the body to produce freshly impregnated moist channels. These channels are then treated and reacted with one or more reactive gases, and the coated body is optionally heated in the presence or absence of inert or reactive gases.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: April 13, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Andreas Schunk, Dirk Demuth, Hartmut Hibst
  • Patent number: 6719950
    Abstract: 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 reference side. The sensor element further includes an exhaust-side electrode on the exhaust side of the support member. The exhaust-side electrode is electrically connected to a contact on the reference side of the support member via a lead extending through the aperture. The aperture is sealed around the lead such that gas cannot pass through the aperture. The support member is oriented substantially parallel to the flow of exhaust gases when the exhaust gas sensor is installed on a vehicle. The sensor further includes a contact pin in the housing that engages the contact and biases the sensor element against a portion of the housing.
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: April 13, 2004
    Assignee: Robert Bosch Corporation
    Inventors: John Day, Jens Stefan Schneider, Harald Neumann, Heinrich Hipp
  • Patent number: 6682935
    Abstract: An optical sensor is proposed for determining gases in gas mixtures, especially for determining one gas component in the air, having a sensitive layer exposed to the gas and having a device for detecting a change in an optical property of the sensitive layer. The sensitive layer of the sensor contains a phosphorus or nitrogen-containing base having numerous and/or long-chain alkyl groups for the pH adjustment of the sensitive layer.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: January 27, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Thomas Brinz, Heidrun Potthast
  • Patent number: 6645772
    Abstract: A method for detecting the presence and amount of carbon monoxide, comprising the use of infrared spectroscopy to compare the spectra of the test gas containing carbon monoxide and the reference gas. The reference gas is the test gas from which carbon monoxide had been removed by conversion using catalysts. The presence and quantity of carbon monoxide is determined by deducting the spectrum of the reference gas from the spectrum of the test gas. The catalysts comprise nanoparticles of gold precipitated on a metal oxide or hydroxide carrier. An apparatus implementing this method.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: November 11, 2003
    Assignee: HRL Laboratories, LLC
    Inventors: Kevin W. Kirby, Amanda C. Phelps, Robert N. Schwartz
  • Patent number: 6623699
    Abstract: An analyzer compensates for gas flow perturbations by providing a makeup flow of carrier gas to maintain the pressure and/or flow rate of analyte and inert gas through a detector constant such that a accurate determination of a low concentration of an analyte in the presence of a high concentration of a second analyte can be accurately determined. In one embodiment, a carrier gas is introduced through a valve responsive to the detected pressure in the gas flow stream between a scrubber and a subsequent detector for maintaining the pressure constant during an analysis. In another embodiment of the invention, a flow transducer is positioned in the gas flow path between the scrubber and detector and coupled to a flow control valve coupled to introduce carrier gas as a function of detected gas flow such that the flow rate of gas into the detector is maintained constant.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: September 23, 2003
    Assignee: Leco Corporation
    Inventors: Brian W. Pack, Carlos Guerra, Peter M. Willis, Joel C. Mitchell
  • Patent number: 6617164
    Abstract: The invention, relates to a method for producing standard gases (CO and H2) for determining the isotope relationships of oxygen and/or hydrogen, in particular during on-line operation, with a sample being decomposed in a (hot) reactor (11) to produce CO and/or H2, and these components being fed to a mass spectrometer (15), and with the mass spectrometer also the gases obtained from the sample. The invention also relates to an apparatus for providing standard gases. The method according to the invention provides for the standard gases in the reactor (11) to be formed by decomposition, and for initial products which are suitable for this purpose to be fed to the reactor.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: September 9, 2003
    Assignee: Finnigan MAT GmbH
    Inventor: Hairigh Avakgharagelou
  • Publication number: 20030166294
    Abstract: A method for detecting the presence and amount of carbon monoxide, comprising the use of infrared spectroscopy to compare the spectra of the test gas containing carbon monoxide and the reference gas. The reference gas is the test gas from which carbon monoxide had been removed by conversion using catalysts. The presence and quantity of carbon monoxide is determined by deducting the spectrum of the reference gas from the spectrum of the test gas. The catalysts comprise nanoparticles of gold precipitated on a metal oxide or hydroxide carrier. An apparatus implementing this method.
    Type: Application
    Filed: March 11, 2003
    Publication date: September 4, 2003
    Applicant: HRL Laboratories, LLC
    Inventors: Kevin W. Kirby, Amanda C. Phelps, Robert N. Schwartz
  • Patent number: 6607700
    Abstract: CO exposure is a serious public health problem in the U.S., causing both morbidity and mortality (lifetime mortality risk approximately 10−4). Sparse data from population-based CO exposure assessments indicate that approximately 10% of the U.S. population is exposed to CO above the National Ambient Air Quality Standard. No CO exposure measurement technology is available for affordable population-based CO exposure assessment studies. Two CO measuring devices, an occupational CO dosimeter (LOCD) and an indoor air quality (IAQ) passive sampler, were designed, developed, and tested both in the laboratories and field. Time-weighted-average CO exposure of the compact diffusion tube sampler containing a selective and non-regenerative palladium-molybdenum based CO sensor is quantified by using a simple spectrophotometer. Both devices are capable of measuring CO exposure precisely with relative standard deviation of less than 20% and with bias of less than 10%.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: August 19, 2003
    Assignee: Quantum Group, Inc.
    Inventors: Michael G. Apte, Mark K. Goldstein, Michelle S. Oum, William B. Helfman
  • Patent number: 6602470
    Abstract: An optical sensor is described for determining the concentration of a gas in gas mixtures, which can especially be used for determining the carbon monoxide content of the air. It includes a radiation source, a sensitive layer positioned on a translucent substrate, and a detector. The sensitive layer of the sensor contains a transition metal compound which forms a transition metal complex with the gas to be determined.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: August 5, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Bernd Siber, Thomas Brinz, Heidrun Potthast, Andreas Hensel
  • Publication number: 20030082822
    Abstract: A method and system for determining a concentration level of NOx in an exhaust stream from a combustion source. The method comprises capturing sample gas from the exhaust stream using a sampling device. NO2 in the sample gas is converted to NO by passing the sample gas through a catalytic NO2 converter. The method also comprises removing water from the sample gas by passing the sample gas through a dryer and determining a sample gas NO concentration level. The step of converting NO2 is performed at a temperature above the dew point temperature of the sample gas.
    Type: Application
    Filed: March 6, 2002
    Publication date: May 1, 2003
    Inventors: William Steven Lanier, Glenn England
  • Publication number: 20030082816
    Abstract: 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 hydrogen samples, requires no purging between different sample types, utilizes a single carrier gas, and eliminates molecular sieves and Shutze converters. The resultant analyzer provides improved quicker results with less plumbing (i.e., gas conduits and valving) in a single instrument.
    Type: Application
    Filed: October 26, 2001
    Publication date: May 1, 2003
    Inventor: Carlos Guerra
  • Publication number: 20030032188
    Abstract: 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 determine when sulfur poisoning occurs. An on-board diagnostic system receives signals from the gas sensors, and, based upon response time differentials between sensors, determines whether the treatment devices are experiencing sulfur poisoning.
    Type: Application
    Filed: August 10, 2001
    Publication date: February 13, 2003
    Inventors: Owen H. Bailey, Jean J. Balland, Sergio Quelhas, Bart Schreurs
  • Publication number: 20030003590
    Abstract: A method and apparatus for measuring the concentration of at least one gaseous component and/or vaporous component of a gaseous mixture in which a controlled sensor flame is introduced into the gaseous mixture and at least one narrow spectral band in the controlled sensor flame is optically measured. The concentration of the gaseous component using a result obtained from the optical measuring of the at least one narrow spectral band is then calculated. The method of this invention is particularly suitable for substantially real-time control of combustion processes.
    Type: Application
    Filed: June 28, 2001
    Publication date: January 2, 2003
    Inventors: Hamid A. Abbasi, David M. Rue
  • Patent number: 6436712
    Abstract: A method and apparatus according to the present invention monitors an emission gas, such as a carbon monoxide gas, from an emission source, such as a carbon monoxide source, by periodically sensing a concentration level of emission gas, such as carbon monoxide, in ambient air and generating a signal corresponding to the sensed concentration level of the emission gas. In response to the signal, a percent blood concentration value of the emission gas is determined. The calculated blood concentration value is compared to a threshold value, and if greater than the threshold value, the source of emission gas, such as carbon monoxide gas, is disabled. The blood concentration value can be determined on a predetermined time interval, and at least in part, can be based on a prior blood concentration value in combination with a current blood concentration value.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: August 20, 2002
    Assignee: General Motors Corporation
    Inventors: James R. Yurgil, Guy E. LaFalce