Oxygen Containing Patents (Class 436/127)
  • 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: 7045097
    Abstract: A biologic electrode array is formed on a semiconductor substrate. A matrix of electrode sites is disposed on the semiconductor substrate. A matrix of optical detectors is disposed beneath the electrode sites in the semiconductor substrate, wherein each electrode site is associated with a corresponding optical detector. The optical detectors are coupled to detection circuitry formed on the semiconductor substrate. The electrode sites may include slitted electrodes, punctuated electrodes, or optically transparent electrodes.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: May 16, 2006
    Assignee: Nanogen, Inc.
    Inventor: Gregory T. A. Kovacs
  • Patent number: 7026165
    Abstract: An apparatus and method for taking absorbance-based chemical measurements are described. In a specific embodiment, an indicator-based pCO2 (partial pressure of CO2) sensor displays sensor-to-sensor reproducibility and measurement stability. These qualities are achieved by: 1) renewing the sensing solution, 2) allowing the sensing solution to reach equilibrium with the analyte, and 3) calculating the response from a ratio of the indicator solution absorbances which are determined relative to a blank solution. Careful solution preparation, wavelength calibration, and stray light rejection also contribute to this calibration-free system. Three pCO2 sensors were calibrated and each had response curves which were essentially identical within the uncertainty of the calibration. Long-term laboratory and field studies showed the response had no drift over extended periods (months).
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: April 11, 2006
    Assignee: The University of Montana
    Inventor: Michael D. DeGrandpre
  • Patent number: 6967104
    Abstract: The present invention relates to a rapid method for estimation of Chemical Oxygen Demand (COD) of water, COD is an important parameter for determining the extent of pollution in water bodies, the basic principle of COD estimation is not much different from prior art but the time taken is reduced considerably and the results are equally sensitive and reproducible as other methods and the method used to generate data on the performance of effluent treatment plants in remote areas or rural areas, it also provide regular and sequential information on the quality of effluent generated by food processing industries.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: November 22, 2005
    Assignee: Council of Scientific and Industrial Research
    Inventors: Vipin Chandra Kalia, Vikas Sonakya, Neena Raizada, Arvind Purshottam Joshi
  • Patent number: 6958243
    Abstract: The present invention is drawn to a method of performing a one-pot organic reactions including carbon monoxide as reactant, without the use of an external CO gas source, wherein a reaction mixture containing a solid or liquid CO releasing compound, a non-metal substrate and a metal catalyst is exposed to an energy source to release carbon monoxide from the CO releasing compound and wherein carbon atoms of the released carbon monoxide form a bond with the non-metal substrate compound. The present invention is further drawn to a method of preparing chemical libraries and a kit for organic reactions.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: October 25, 2005
    Assignee: Biotage AB
    Inventors: Mats Larhed, Mathias Alterman, Yiqian Wan, Hallberg Anders, Nils-Fredrik Kaiser
  • Patent number: 6933151
    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: Grant
    Filed: October 7, 2004
    Date of Patent: August 23, 2005
    Assignee: Delphi Technologies, Inc.
    Inventors: Owen H. Bailey, Jean J. Balland, Sergio Quelhas, Bart Schreurs
  • Patent number: 6927066
    Abstract: 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 oxygenated additive.
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: August 9, 2005
    Assignee: Enitecnologie S.p.A.
    Inventor: Lucio De Angelis
  • Patent number: 6913731
    Abstract: 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) for attachment to the orifice of duct wall (3), which body (4) houses within it sensor element (2) of the probe which is thus placed inside the duct, with second body (8) screwed onto first body (4) and exerting on sensor element (2) the pressure required to secure it in its housing, with second body (8) further provided with an axial orifice through which passes a metallic tube (9) open to the exterior and which is provided with a metallic washer (10), soldered to said tube (9), which is separated from second body (8) by an electrically insulating washer (12).
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: July 5, 2005
    Assignee: Union Fenosa Generacion, S.A.
    Inventors: José Manuel Bueno Harto, Francisco Javier Perosanz Lopez
  • Patent number: 6881582
    Abstract: Disclosed is a method of making a bismuth molybdate precursor solution using a metallorganic decomposition (MOD) process consisting of the formation of a precursor sol of hexanoates of Bismuth (Bi) and Molybdenum (Mo). The precursor solution is used to make thin film of Bismuth molybdate by spin coating and spray pyrolysis. The bismuth molybdate films have the useful alpha and gamma phases having high sensitivity to ethanol gas, the detection of the ethanol gas is based upon the change of electrical conductivity of a thick film of the semiconductor oxide sensing element resulting from the ethanol gas in an oxygen-containing atmosphere. When the drying is effected by spray pyrolysis, quite thick films with high adhesion have been produced over different substrates, including quartz. The thin film of the present invention made by spray pyrolysis has a very fast response to ethanol detection eg typically 5 seconds.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: April 19, 2005
    Assignee: Council of Scientific and Industrial Research
    Inventors: Alok Chandra Ratogi, Kiran Jain, Heremba Prasad Gupta, Vipin Kumar
  • Patent number: 6867048
    Abstract: A method of addressing and driving an electrode array includes the step of addressing one or more electrodes within the array using a plurality of row and column lines. In one aspect of the method, a value corresponding to a voltage is stored in a local memory associated with each electrode. The addressed electrodes are then driven at the voltages corresponding to the stored values. In another aspect of the method, a driving element associated with each addressed electrode is selectively coupled with a voltage line so as to charge the electrode with the voltage on the voltage line. The device and methods may be used in the synthesis of biopolymers such as oligonucleotides and peptides.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: March 15, 2005
    Assignee: Nanogen, Inc.
    Inventor: Gregory T. A. Kovacs
  • Patent number: 6864094
    Abstract: The present invention provides a method for preserving an oxygen infusion containing an aqueous suspension of molecular assemblies which contain hemoglobin or a heme compound, by: a) modifying the molecular assemblies with polyoxyethylene; and b) converting the hemoglobin or the heme compound into a deoxy-form by removing oxygen from the suspension.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: March 8, 2005
    Assignee: Japan Science and Technology Corporation
    Inventors: Eishun Tsuchida, Hiromi Sakai, Kenichi Tomiyama, Shinji Takeoka, Keitaro Sou
  • Patent number: 6841387
    Abstract: The invention comprises novel apparatuses and testing methods for evaluating a fluid diffusion component. The apparatus includes a fluid capable of undergoing oxidation or reduction, a half-cell electrode assembly able to receive the fluid, and a change in acidity indicator in communication with the assembly. An inventive method of the invention includes the steps of passing a fluid capable of undergoing oxidation or reduction through a half-cell electrode assembly to form a sample, contacting the sample with an indicator, and detecting a change in acidity in the indicator.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: January 11, 2005
    Assignee: Advanced Energy Technology Inc.
    Inventor: David M. Kaschak
  • 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
  • Publication number: 20040235193
    Abstract: Methods, systems and kits for the simultaneous or sequential analysis of one or more hormones by mass spectrometry are disclosed. The methods require minimal sample size and minimal preparation time. The methods comprise ionizing the hormones and analyzing the hormones by mass spectrometry. In addition, methods, systems and kits for the simultaneous or sequential analysis of steroid hormones are disclosed comprising ionization of the steroid hormones by photoionization.
    Type: Application
    Filed: April 14, 2004
    Publication date: November 25, 2004
    Inventor: Steven J. Soldin
  • Patent number: 6811751
    Abstract: Method and apparatus for determining in a person's exhalation air the concentration of a specific substance in the blood by measuring the concentration of said substance and the concentration of water vapor in the exhalation air and utilizing a known relationship between these concentrations. When the method is applied the exhalation air is exhaled freely in a defined air volume having a predetermined composition, and said concentrations are measured in this air volume. The apparatus for working the method comprises a device (16) which defines a space for receiving the exhalation air, which has two mutually opposite openings through which the space communicates with the surrounding air, and means (18, 22, 23) for selective quantitative detection of said substance in the air in the defined space.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: November 2, 2004
    Assignee: Servotek AB
    Inventors: Sven Gunnar Olsson, Stefan Brauer, Anders Linge, Tarmo Niininen, Krista Nilsson, Goran Rydgren
  • Patent number: 6812029
    Abstract: In order to prevent a catalyst for an internal combustion engine from decreasing efficiency by deterioration after long time use of the catalyst, the decreased efficiency of the catalyst is determined, and the internal engine is controlled based on results of the determination so as to maintain high efficiency of the catalyst. The catalyst is installed in an exhaust pipe of the engine. Sensors for detecting conditions of exhaust gas both at upstream side and downstream side of the catalyst are provided, respectively. As for the sensor, for example, an oxygen sensor of which output varies stepwise at &lgr;=1, or a sensor of which output varies in proportion to air-fuel ratio can be used. Detected values of the sensors are taken into a control unit, eliminating efficiency and deteriorating degree of the catalyst are estimated by comparison of the detected values, and the engine is controlled so that the eliminating efficiency becomes maximum.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: November 2, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Ohsuga, Mamoru Fujieda, Nobuo Kurihara
  • Patent number: 6806091
    Abstract: The present invention relates to a method and apparatus for determining blood oxygen transport, and to measure lipid levels by correlating these levels with the rate at which oxygen diffuses through the red blood cell membrane.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: October 19, 2004
    Inventors: Henry Buchwald, Hector J. Menchaca, Van Michalek, Thomas J. O'Dea, Thomas D. Rohde
  • Patent number: 6803236
    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: Grant
    Filed: August 10, 2001
    Date of Patent: October 12, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: Owen H. Bailey, Jean J. Balland, Sergio Quelhas, Bart Schreurs
  • Publication number: 20040170894
    Abstract: A positive electrode active material for use in a non-aqueous electrolyte secondary cell comprises a powdery metal oxide (LiCoO2, LiNiO2, LiMn2O4 or the like). When the positive electrode active material is classified with a classification precision index &kgr; of 0.7 or greater so as to obtain a coarse powder having a classification ratio in a range of 0.1% to 5%, a ratio (B/A) of the content (B) of an impurity metal element in the coarse powder obtained by the classification to the content (A) of the impurity metal element in the powder before the classification is 1.5 or less. The contents of the impurity metal elements are compared with respect to Ca, Mn, Fe, Cr, Cu, Zn and the like (exclusive of the metal element constituting the powdery metal oxide). The positive electrode active material for a secondary cell serves to improve cell performance capabilities and production yields.
    Type: Application
    Filed: December 12, 2003
    Publication date: September 2, 2004
    Inventors: Ryo Sakai, Yasuhiro Shirakawa, Hajime Takeuchi, Yasumasa Ooya, Koshin Tanaka, Kazuki Amemiya, Shouta Endou
  • Patent number: 6767715
    Abstract: A compound of the formula wherein X is Cl or CH3, or a salt thereof, is useful as a spin trap in various assays.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: July 27, 2004
    Assignee: Randox Laboratories Ltd.
    Inventors: Lynne Hamilton, Paul Graham Winyard
  • Publication number: 20040142489
    Abstract: The invention relates to a method and apparatus for determining a concentration of a component in an unknown mixture. The method includes the steps of preparing a reactant having a specified pH level and a specified temperature and combining the unknown mixture with the reactant. The method further includes varying the pH level and temperature of the combination of the reactant and the unknown mixture to facilitate converting at least one selected component. Upon varying the pH level and temperature, the method will release volatiles from the selected component(s). Based on these released volatiles, which indicate the concentration of the selected component(s), the method detects the indication. The apparatus for determining a concentration of a component in an unknown mixture includes a container having a specified volume, a reactant chamber, and a sample chamber. The receptacle contains a reactant, placed within the reactant chamber, having a predetermined pH level and a predetermined volume.
    Type: Application
    Filed: January 16, 2003
    Publication date: July 22, 2004
    Inventors: Otto J. Prohaska, Avinash Dalmia
  • Publication number: 20040126891
    Abstract: A method of assaying the reactive oxidants present in a smoke sample, the method comprising: preparing solution including a reductant; passing smoke through the solution; detecting the concentration changes of the probe in the presence of the smoke sample over time; and calculating the concentration of reactive oxidants of the smoke sample from the concentration changes of the reductant in the presence of the smoke sample. A method of assaying the reactive oxidants present in a smoke sample, the method comprising: preparing a solid material containing a reductant; passing smoke through the solid material; detecting the concentration changes of the reductant in the presence of the smoke sample over time; and calculating the concentration of reactive oxidants of the smoke sample from the concentration changes of the reductant in the presence of the smoke sample.
    Type: Application
    Filed: December 26, 2002
    Publication date: July 1, 2004
    Applicant: Brunswick Laboratories
    Inventors: Dejian Huang, Boxin Ou
  • Publication number: 20040106209
    Abstract: The present invention is directed to methods used to detect metabolic activity of biological samples based on their ability to consume oxygen.
    Type: Application
    Filed: September 28, 2001
    Publication date: June 3, 2004
    Inventor: Steven C. Keith
  • 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: 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: 6703245
    Abstract: The oxygen detecting composition of the present invention includes a layered silicate, a cationic surfactant, an organic colorant, a reducing agent, and optionally a basic substance. The oxygen detecting composition is suitable for indicating the presence or absence of oxygen or the degree of oxygen concentration by its reversible color change because of its high light resistance, high heat resistance, transparency and translucency.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: March 9, 2004
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Makoto Sumitani, Haruo Inoue, Ken Sugito
  • Publication number: 20040043498
    Abstract: Compounds useful as agents for measurement of singlet oxygen, which are represented by the following general formula (I): 1
    Type: Application
    Filed: August 27, 2003
    Publication date: March 4, 2004
    Inventors: Tetsuo Nagano, Yasuteru Urano, Kumi Tanaka
  • Patent number: 6692970
    Abstract: A method and apparatus are provided for measuring the gas efflux from a substrate. In particular, one or more measuring chambers receive a gas enriched air from the substrate. A respiration system sends reference air having a known gas concentration to the measuring chamber. The reference air mixes with the gas enriched air to form a mixed air, which is returned to the respiration system. The respiration system then measures the gas efflux of the substrate over the given amount of time.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: February 17, 2004
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: John R. Butnor, Christopher A. Maier, Kurt H. Johnsen
  • Publication number: 20040029294
    Abstract: A method for determining the origin of substances with biological, biochemical and nutritional physiological relevance and distinguishing them from synthetic analogs using their relative positional oxygen or hydrogen isotope ratios (&dgr;18O value and &dgr;2H value), in which—based on the fact that for organic compounds there are at least two different primary or secondary sources for these elements, each with different isotope values, and the incorporation of these elements is accompanied by different, but characteristic effects—the positional &dgr;18O values or &dgr;2H values are individually determined in the substances to be tested and they are compared with the values expected from biosynthesis, where a correspondence or deviation allows the authenticity or origin or adulteration of the substance to be detected.
    Type: Application
    Filed: June 10, 2003
    Publication date: February 12, 2004
    Inventors: Hanns-Ludwig Schmidt, Claudio Fuganti
  • Patent number: 6682936
    Abstract: A biologic electrode array assembly is formed on an integrated circuit chip that includes an array of electrodes. At least one metal oxide semiconductor (MOS) switch is coupled to at least one of the electrodes within the array. A voltage line is provided that is selectively connected to the at least one electrode via the MOS switch. A voltage source is coupled to the voltage line. In one preferred aspect of the invention, the MOS switch is a CMOS switch. In another aspect of the invention, an addressable memory is associated with the at least one electrode located within the array.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: January 27, 2004
    Assignee: Nanogen, Inc.
    Inventor: Gregory T. A. Kovacs
  • Publication number: 20030236591
    Abstract: A process and system for purifying an impure gas to produce a purified gas in a gas purification system and protecting the system from damage by a) passing a portion of a first gas stream into a reactor vessel, which exits as a second purified gas stream; b) combining a portion of the second purified gas stream with another portion of the first gas stream to form a combined gas stream; and c) passing the combined gas stream into a sensing device to regulate the flow of the first and second gas streams into the reactor vessel.
    Type: Application
    Filed: June 20, 2002
    Publication date: December 25, 2003
    Inventors: John Fredric Billingham, Jerry Michael Mahl
  • Patent number: 6660231
    Abstract: The mixed oxide WxMo1-xO3, where preferably x can be in the range 0.01 to 0.9, is very useful for the detection of oxidizing gases and in particular is superior for the detection of ozone. The preferred composition is in the range of 1% to 21% Mo (i.e. 99% to 79% W). The present example in which the composition of the sensing material is in the range WxMo1-xO3 with x varying from 0.01 to 0.9, is clearly distinct from the device claimed in applicant's earlier patent. Precipitation of the material as a mixed oxide from an aqueous solution of the ammonium metallates in concentrations of the appropriate stoichiometric proportions yields a powder that can be screen-printed to give an ideal microstructure. Resistivity of the material may be tailored to a desired value by adjusting the Mo/W ratio within the single phase field. Varying this ratio adjusts catalytic properties of the material.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: December 9, 2003
    Assignee: Atmospheric Sensors, LLC
    Inventor: Patrick T. Moseley
  • Publication number: 20030219907
    Abstract: An apparatus for notifying a user which gas tank(s) to connect to an enclosed chamber such as an incubator. The user inputs the desired setpoints for gasses such as O2 and CO2, and the corresponding gas level is determined. The determined gas level is compared with the setpoint of the gas and can display, which gas tank(s) should be hooked up to chamber.
    Type: Application
    Filed: May 22, 2002
    Publication date: November 27, 2003
    Applicant: Kendro Laboratory Products, Inc.
    Inventors: Richard H. Bair, Bryan M. Elwood
  • 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: 6638711
    Abstract: The invention relates to methods for identifying candidate pharmacological agents to be used in the treatment and/or prevention of Alzheimer's disease and/or related pathological conditions.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: October 28, 2003
    Assignee: The General Hospital Corporation
    Inventors: Ashley I. Bush, Xudong Huang, Craig S. Atwood, Rudolph E. Tanzi
  • Publication number: 20030194351
    Abstract: A galvanic measuring device for detecting oxygen content in a gas flow, having a sealed gas flow chamber and a layer of sodium chloride saturated sponge material lining the interior of the gas flow chamber, for providing a constant source of humidity to the chamber.
    Type: Application
    Filed: April 15, 2002
    Publication date: October 16, 2003
    Inventor: Stephen D. Tuomela
  • Patent number: 6627443
    Abstract: The present invention relates to new color compositions which are especially suitable to be used in oxygen indicators. The compositions comprise iron(II), an agent containing pyrogallol entities and an organic acid.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: September 30, 2003
    Assignee: Fresenius Kabi AB
    Inventors: Åke Stenholm, Lars Karlsson, Anders Löfgren, Bo Nystrom, Otto Skolling
  • Patent number: 6623975
    Abstract: A method and system for vehicle emission testing measures pollutant concentration, but then provides for conversion of the measured pollutant concentration into its corresponding pollutant mass, thereby allowing for the calculation of a vehicle's emission test scores for one or more common pollutants in units of mass per distance. Through the use of the method and system of the present invention, significantly more accurate results can be obtained as compared to prior art test methods, and without the implementation, operating, and maintenance costs of comparable test methods.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: September 23, 2003
    Assignee: Gordon-Darby Systems, Inc.
    Inventors: Robert J. Tefft, S. Jay Gordon, Clifton Mahaffey
  • 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
  • Publication number: 20030148533
    Abstract: The present invention provides a combination of carbon-13 and deuterium metabolic tracers and methods that when used in conjuction with nuclear manegtic resonance spectroscopy, provide a measurement of metabolic fluxes in the target organisms. The tracers of the present invention may be taken orally during the same clinical exam. The metabolic information can be derived from blood, urine or other fluids to provide a comprehensive profile of glucogenic metabolism. The subject matter of the present invention may be applied to the study of metabolic dysfunction related to obesity, diabetes, HIV infection and a variety of other disease conditions.
    Type: Application
    Filed: May 1, 2001
    Publication date: August 7, 2003
    Inventors: Craig R. Malloy, A. Dean Sherry, John G. Jones
  • Publication number: 20030092189
    Abstract: A test method and device are described for quantitatively determining the presence and concentration of chlorine dioxide in aqueous solution, which may contain chlorine. Contacting the aqueous solution containing chlorine dioxide with a test strip in accordance with the invention produces a color change in proportion to the concentration of the chlorine dioxide. The invention has particular utility in determining the presence of chlorine dioxide in water containing chlorine such as municipal water.
    Type: Application
    Filed: October 16, 2001
    Publication date: May 15, 2003
    Inventors: Lydia K. Johnson, Vinay D. Ghanekar
  • Patent number: 6564155
    Abstract: A method and an apparatus tests liquids. When the method is implemented, following a reaction of constituents in the liquid with the maximum quantity at least of one free oxidizing agent and/or reagent contained in the liquid, the quantity of oxidizing agent and/or reagent remaining in the liquid is displayed visually as a measure of the quantity of constituents in the liquid reacting with the oxidizing agent and/or reagent. For implementing the method, use is made of a sensor that is configured as a sheet-like structural element and is provided with at least one inlet opening, a sample-accommodating channel, a mechanical pump, a transporting capillary, a detection zone, an emptying channel, and an outlet opening.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: May 13, 2003
    Assignee: ABB Patent GmbH
    Inventors: Albrecht Vogel, Dieter Binz, Peter Krippner, Sean Keeping
  • 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: 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
  • Patent number: 6511850
    Abstract: A self-adjusting, free-flowing pneumatic nebulizer interface is described for coupling fluid phase separation apparatus such as capillary electrophoresis apparatus or fluid-phase analyte delivery apparatus such as flow-injection analysis apparatus to gas phase, post-separation detection apparatus such as mass spectrometers, chemiluminescence detectors, or other similar gas phase detection apparatus. The interface combines the analytes with only the needed amount of sheath fluid to produce a combined flow whose magnitude automatically matches the self-aspiration rate of the pneumatic nebulizer interface, and which is combined with a gas flow to produce an aerosol. The resulting aerosol can then be either deposited directly on a surface, forwarded directly to a detection system or forwarded first to a conversion apparatus such as an oxidizer and the oxidized sample components are then forwarded to a detector.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: January 28, 2003
    Assignee: The Texas A&M University System
    Inventors: Gyula Vigh, Alex D. Sokolowski
  • Publication number: 20030017603
    Abstract: An upstream side catalyst and a downstream side catalyst are disposed in an exhaust passage. A first oxygen sensor is disposed between these two catalysts and a second oxygen sensor is disposed downstream of the downstream side catalyst. The air-fuel ratio is forcibly oscillated and the oxygen storage capacity of the upstream side catalyst is detected. Deterioration of the upstream side catalyst is then detected based on whether this oxygen storage capacity is larger than a predetermined value. The forced oscillation of the air-fuel ratio is performed only when the oxygen storage state of the downstream side catalyst is appropriate.
    Type: Application
    Filed: July 15, 2002
    Publication date: January 23, 2003
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro Uchida, Hiroshi Sawada, Toshinari Nagai, Akihiro Katayama, Yasuhiro Kuze, Naoto Kato
  • Patent number: 6495370
    Abstract: This invention relates to novel haloenol lactone compounds. These compounds have the following general structure: in which Ar is an aryl group and Y is a haloenol lactone moiety. The compounds of the invention are useful for the specific measurement of particular isoenzymes of glutathione S-transferase. Measurement of glutathione S-transferase isoenzymes has importance in diagnostic medicine. The compounds of the invention are also useful for treatment of drug resistance in cancer and for preventing herbicide resistance in plants.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: December 17, 2002
    Assignee: The Regents of the University of California
    Inventors: A. Daniel Jones, Alyson E. Mitchell, Bruce D. Hammock, Jiang Zheng
  • Patent number: 6468657
    Abstract: Multilayered porous materials are formed by coating a porous substrate with a metal and adsorbing an organic layer comprising a recognition moiety onto the metal film. The recognition moiety interacts with an analyte of interest allowing for its detection, purification, etc. Suitable recognition moieties can be selected from a range of species including, small molecules, polymers and biomolecules and the like. The novel porous materials of the invention can be utilized in an array of methods including, ion-exchange, ion-selective ion-exchange, assays, affinity dialysis, size exclusion dialysis and the like.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: October 22, 2002
    Assignee: The Regents of the University of California
    Inventors: Zhizhong Hou, Pieter Stroeve, Nicholas Abbott
  • Publication number: 20020150507
    Abstract: 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 gas to be analyzed, by which water droplets carried along in the direction of the sensor member are evaporated before reaching the sensor member. In this way, the water droplets are unable to cause any shock-like temperature drops at spots on the surface of the sensor member or material flaking.
    Type: Application
    Filed: October 19, 2001
    Publication date: October 17, 2002
    Inventors: Helmut Weyl, Hans-Martin Wiedenmann
  • Publication number: 20020152036
    Abstract: This invention is directed to a method and apparatus for controlling and optimizing the feed of two or more oxidizers to an aqueous stream, thereby providing a synergistic effect. The system combines the use of amperometric or ORP based sensor technology with amperometric sensor technology employing a gas permeable membrane, thereby providing definitive control of each oxidizer feed stream.
    Type: Application
    Filed: February 9, 2001
    Publication date: October 17, 2002
    Inventor: Roy Martin