Only Hydrogen Sulfide Patents (Class 436/121)
  • Patent number: 10722819
    Abstract: A sample catching system for cleaning a drilling fluid in a drilling operation includes a first line having a first entrance valve configured to allow the drilling fluid to flow into the first line, a first chemical sensor for measuring the amount of hydrogen sulfide of the drilling fluid in the first line, and a first sample catch valve configured to allow the drilling fluid to flow out of the first line. The system also includes a second line having a second entrance valve configured to allow the drilling fluid to flow into the second line, a sample catch pump, and a controller configured to determine the amount of hydrogen sulfide is above a predetermined threshold value, and open the second entrance valve to divert drilling fluid intake from the first line to the second line, and close the first entrance valve to stop the drilling fluid from entering the first line.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: July 28, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Ossama Sehsah, Victor Carlos Costa de Oliveira, Mario Augusto Rivas Martinez
  • Patent number: 10605068
    Abstract: An electrochemical fluid sensor for a downhole production tool positionable in a wellbore penetrating a subterranean is provided. The wellbore has a downhole fluid therein. The electrochemical fluid sensor includes a sensor housing positionable in the downhole tool, a sensing solution positionable in the housing (the sensing solution including a mediator reactive to target chemicals), a gas permeable membrane to fluidly isolate the downhole fluid from the sensing solution (the gas permeable membrane permitting the passage of gas to the sensing solution), and a plurality of electrodes positioned about the housing a distance from the gas permeable membrane to measure reaction by the sensing solution whereby downhole parameters may be determined.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: March 31, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Laurent Pirolli, Gary Martin Oddie, Andrew Meredith, Nathan S. Lawrence, Kay McGuinness, John Collins
  • Patent number: 10478754
    Abstract: A sample catching system for cleaning a drilling fluid in a drilling operation includes a first line having a first entrance valve configured to allow the drilling fluid to flow into the first line, a first chemical sensor for measuring the amount of hydrogen sulfide of the drilling fluid in the first line, and a first sample catch valve configured to allow the drilling fluid to flow out of the first line. The system also includes a second line having a second entrance valve configured to allow the drilling fluid to flow into the second line, a sample catch pump, and a controller configured to determine the amount of hydrogen sulfide is above a predetermined threshold value, and open the second entrance valve to divert drilling fluid intake from the first line to the second line, and close the first entrance valve to stop the drilling fluid from entering the first line.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: November 19, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Ossama Sehsah, Victor Carlos Costa de Oliveira, Mario Augusto Rivas Martinez
  • Patent number: 10340556
    Abstract: A battery cell includes a first resistance change member having first and second terminals, a first power generation element including a first positive electrode, a first negative electrode, and a first electrolyte interposed between the first positive electrode and the first negative electrode, a first case enclosing the first power generation element and the first resistance change member, and first positive and negative electrode terminals. At least one of the first positive electrode, the first negative electrode, and the first electrolyte contains a first sulfur-based material. The first resistance change member contains a first resistance change material of which electrical resistance is changed by a chemical reaction with hydrogen sulfide. The first and second terminals of the first resistance change member are exposed to the outside of the first case, and the first resistance change member is not electrically connected to any of the first positive and negative electrode terminals.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: July 2, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Tomoyuki Komori
  • Patent number: 9228988
    Abstract: A method for producing a conductive molecularly imprinted polymer film for detection of an airborne target molecule includes (a) dissolving a polymer host comprising a structural component and a conductive component in a first solvent to form a first solution, wherein the structural component includes nylon-6 or polyethyleneimine and the conductive component includes polyaniline, (b) adding a target molecule to the first solution, (c) mixing the target molecule into the first solution to form a molecularly imprinted polymer solution, (d) coating the molecularly imprinted polymer solution onto a surface, (e) and removing the target molecule to form the conductive molecularly imprinted polymer film.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: January 5, 2016
    Assignee: The Trustees of Dartmouth College
    Inventor: Joseph J. Belbruno
  • Patent number: 9051821
    Abstract: Example microfluidic methods and apparatus to perform in situ chemical detection are disclosed. A disclosed example downhole apparatus comprises a microfluidic chamber to introduce a microfluidic-scale drop of a reagent into a formation fluid to form a mixed fluid, a flowline to fluidly couple the formation fluid from a geologic formation to the microfluidic chamber, and a detector to measure a property of the mixed fluid, the property representative of a presence of a chemical in the formation fluid.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: June 9, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Wei Heong Tan, Christopher Harrison, Tsutomu Yamate
  • Patent number: 9052289
    Abstract: Methods and related apparatuses and mixtures are described for spectroscopic detection of hydrogen sulfide in a fluid, for example a formation fluid downhole. A reagent mixture is combined with the fluid. The reagent mixture includes metal ions for reacting with hydrogen sulfide forming a metal sulfide, and a capping agent that limits growth of the insoluble metal sulfide species by electrosteric or steric stabilization. The particle growth is one of chemical reaction or significant aggregation, and the capping agent further functionalizes the reagent mixture to exhibit properties outside the natural characteristics of the metal sulfide species to allow for spectroscopic detection of the metal sulfide species. The combined mixture and fluid is then spectroscopically interrogated to detect the presence of the metal sulfide thereby indicating the presence of hydrogen sulfide in the fluid. The mixture also includes chelating ligands for sustaining thermal endurance of the mixture under downhole conditions.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: June 9, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Jimmy Lawrence, Ronald van Hal, Jane Lam
  • Patent number: 9029160
    Abstract: The subject of the invention is a method for determining the H2S content arising during the warm storage of sulfur-containing crude and residual oils and mineral distillates containing sulfur-containing crude and/or residual oils, in which a sample of the sulfur-containing mineral oil is dissolved in a solvent or solvent mixture that boils at more than 200° C. and a carrier gas is caused to flow through the solution of the sulfur-containing mineral oil at temperatures above 80° C., and the quantity of hydrogen sulfide carried out with the carrier gas is analyzed quantitatively.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: May 12, 2015
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Michael Feustel, Michael Brauchle, Dominko Andrin, Matthias Krull
  • Patent number: 9005528
    Abstract: A method and apparatus for the collection, transportation and analysis of gas samples which may be required in various scientific, environmental and natural resource contexts is provided. The apparatus comprises a sampling container assembly for sampling a fluid. The container assembly comprises a body defining a sampling chamber having a first end and a second end, a first valve assembly fluidly coupled with the first end and a reactant material positioned within the sampling chamber for reacting with the fluid. After collection of the sample in the sampling container assembly, hazardous fluids are converted to non-hazardous materials that can be transported without additional hazardous material restraints. Further, the flow through design of the sampling container assembly allows for the collection of gases such as H2S at low concentrations by flowing the gas over the reactant materials for longer periods of time.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: April 14, 2015
    Assignee: Weatherford Switzerland Trading and Development GmbH
    Inventors: Todd Coleman, Corben Rice, Dennis Coleman
  • Publication number: 20150056713
    Abstract: A method to measure all relevant biologic hydrogen sulfide pools, namely free hydrogen sulfide, acid-labile sulfide, and bound sulfane sulfur, has been developed. This new method involves selective liberation, trapping and derivatization of labile hydrogen sulfide. The total labile sulfide, including the contribution of the bound sulfane sulfur pool, the acid-labile pool, and free H2S, was measured by incubating the sample with a reducing agent, TCEP (Tris(2-carboxyethyl)phosphine hydrochloride), to reduce disulfide bonds in an acid solution. This method was used to measure the three sulfide pools in blood samples from mice and from humans. This method can be used for research, environmental, and clinical diagnostic purposes in determining hydrogen sulfide bioavailability in biological or other samples.
    Type: Application
    Filed: March 14, 2013
    Publication date: February 26, 2015
    Applicant: LSU System Office
    Inventors: Christopher G. Kevil, Xinggui Shen, Elvis A. Peter
  • Publication number: 20140356971
    Abstract: A hydrogen sulfide gas detector is provided. The detector includes a metal oxide semiconductor-based hydrogen sulfide gas sensor having an electrical characteristic that varies with hydrogen sulfide gas concentration. Measurement circuitry is coupled to the metal oxide semiconductor-based hydrogen sulfide gas detector to measure the electrical characteristic. A controller is coupled to the measurement circuitry and is configured to receive an indication of the electrical characteristic of the hydrogen sulfide gas sensor as well as an indication of ambient humidity. The controller is configured to provide a compensated hydrogen sulfide gas concentration output based on the indication of the electrical characteristic of the hydrogen sulfide gas sensor, an indication of ambient temperature, and the indication of ambient humidity.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 4, 2014
    Applicant: Rosemount Analytical Inc.
    Inventors: Henryk Kozlow, Alastair Kerr Muir, Todd Christopher Phelps, Lucjan Antoni Oleszczuk
  • Patent number: 8796035
    Abstract: The invention relates to a method and to a device for sulfur characterization and quantification in a sample of sedimentary rocks or of petroleum products wherein the following stages are carried out: heating said sample in a pyrolysis oven (1) in a non-oxidizing atmosphere, oxidizing part of the pyrolysis effluents and continuously measuring the amount of SO2 generated by said part after oxidation, then transferring the pyrolysis residue of said sample into an oxidation oven (1?) and continuously measuring the amount of SO2 contained in the effluents resulting from said oxidation heating.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: August 5, 2014
    Assignees: IFP Energies Nouvelles, Vinci Technologies
    Inventors: Jean Espitalie, Roland Antonas, Violaine Lamoureux-Var, Gérémie Letort, Daniel Pillot, Valérie Beaumont, Frank Haeseler
  • Patent number: 8785207
    Abstract: The present invention relates generally a method and apparatus for measuring multiple parameters in-situ in a sample collected from an environmental system via a single device. In one embodiment, the method includes collecting the sample from said environmental system via the single device, measuring a first parameter of the sample in-situ via the single device, adding a reagent tot the sample within the single device to create a reagent infused sample and measuring a second parameter of the sample in-situ via the single device using the reagent infused sample.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: July 22, 2014
    Assignee: SRI International
    Inventors: Ryan J. Bell, R. Timothy Short, Strawn K. Toler, Robert H. Byrne
  • Patent number: 8734723
    Abstract: A gas sensor cell using a liquid crystal composite material is provided. The gas sensor cell has recovery capability and can be reused. Upon gas adsorption, the liquid crystal composite material has visually detectable color changes and changes in electrical properties to facilitate the measurement of gas concentration from low to high.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: May 27, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Chin-Kai Chang, Hui-Lung Kuo
  • Patent number: 8709820
    Abstract: A concentration measuring apparatus for hydrogen sulfide includes an absorbing liquid that can absorb gaseous hydrogen sulfide as sulfide ion; a hollow fiber membrane contactor that contacts a gas flow with a flow of the absorbing liquid through a membrane, so that the absorbing liquid absorbs gaseous hydrogen sulfide in the gas flow as sulfide ion; a pump for a first channel that feeds the absorbing liquid to the hollow fiber membrane contactor; an oxidizer that exothermically reacts with sulfide ion; a pump for a second channel that feeds the oxidizer to the absorbing liquid; a first thermometer that measures a temperature of the absorbing liquid before the sulfide ion that the absorbing liquid has absorbed exothermically reacts with the oxidizer; and a second thermometer that measures the temperature of the absorbing liquid after the sulfide ion that the absorbing liquid has absorbed exothermically reacts with the oxidizer.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: April 29, 2014
    Assignees: Japan Cooperation Center, Petroleum, United Arab Emirates University
    Inventors: Sayed Marzouk, Mohamed Al Marzouqi
  • Patent number: 8697451
    Abstract: A sulfur breakthrough monitoring assembly for use in a fuel utilization system for detecting sulfur-containing compounds in desulfurized fuel, said monitoring assembly comprising: a heater for heating desulfurized fuel to a predetermined temperature, the predetermined temperature being between 450° C. and 600° C., a sulfur breakthrough detector adapted to receive heated fuel from the heater and including at least a reforming catalyst bed for reforming the heated fuel and a plurality of temperature sensors including a first temperature sensor for sensing temperature of the heated fuel before the fuel is conveyed through the reforming catalyst bed and a second temperature sensor for sensing temperature in the reforming catalyst bed, and a controller for determining whether concentration of the sulfur-containing compounds in the fuel exceeds a first predetermined concentration based on temperature outputs from the first and second temperature sensors.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: April 15, 2014
    Assignee: FuelCell Energy, Inc.
    Inventor: Joseph M. Daly
  • Patent number: 8621911
    Abstract: A method and system for measuring or assessing the homeostatic relationship between gases in the body, environment or water. The measured or assessed level of gases in the body, environment or air uses the interrelationships of the various components in order to establish guidelines for treating individuals, the environment or water.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: January 7, 2014
    Inventor: William J. McFaul
  • Publication number: 20130302904
    Abstract: Selective chemosensing agents for hydrogen sulfide are provided. The chemosensing agents can act fast under mild conditions, are chemically stable for long-term storage, are sensitive for detection under near physiological conditions, show a linear concentration-signal relationship within physiologically relevant hydrogen sulfide concentration ranges for easy quantitation, show minimal or no interference by other anions in the blood, and are functional in aqueous solutions and blood plasma.
    Type: Application
    Filed: January 6, 2012
    Publication date: November 14, 2013
    Applicant: GEORGIA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
    Inventors: Hanjing Peng, Binghe Wang
  • Patent number: 8518706
    Abstract: The invention relates to a method for sampling a sulphur-containing solid product including supplying a gas flow comprising hydrogen sulphide, bringing the gas flow into contact with a solid reagent and reacting the solid reagent with the hydrogen sulphide contained in the gas flow, the reaction fixing the sulphur of the hydrogen sulphide by forming a sulphur-containing solid product which is different in color from the solid reagent, and recovering the sulphur-containing solid product. The invention also relates to a device suitable for the implementation of this method.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: August 27, 2013
    Assignee: Total S.A.
    Inventors: Daniel Dessort, Robert Le Van Loï, Nadine Loubere
  • Publication number: 20130040397
    Abstract: A method for preparing carbon allotrope based sulfide detectors comprising first functionalizing a carbon allotrope, such as a single-walled carbon nanotubes or graphene, with a solution of a polynuclear aromatic hydrocarbon-sulfonic acid, such as 1-pyrenesulfonic acid, followed by treatment with a metal, such as gold nanowires or cupric salt doped polyaniline, to give a metal-functionalized carbon allotrope, then drop casting the metal-functionalized carbon allotrope onto an inert surface, such as a silicon dioxide film on a silicon wafer having electrodes. Detection of sulfides may be by means such as photochemical or conductance methods. The hydrogen sulfide detectors may be used to detect and/or quantitate ppb and ppm levels of hydrogen sulfide in industrial settings or in detecting halitosis.
    Type: Application
    Filed: October 3, 2011
    Publication date: February 14, 2013
    Inventors: ALEXANDER STAR, Mengning Ding
  • Patent number: 8319334
    Abstract: An electronic device includes at least one semiconductor chip, each semiconductor chip defining a first main face and a second main face opposite to the first main face. A first metal layer is coupled to the first main face of the at least one semiconductor chip and a second metal layer is coupled to the second main face of the at least one semiconductor chip. A third metal layer overlies the first metal layer and a fourth metal layer overlies the second metal layer. A first through-connection extends from the third metal layer to the fourth metal layer, the first through-connection being electrically connected with the first metal layer and electrically disconnected from the second metal layer. A second through-connection extends from the third metal layer to the fourth metal layer, the second through-connection being electrically connected with the second metal layer and electrically disconnected from the first metal layer.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: November 27, 2012
    Assignee: Infineon Technologies AG
    Inventor: Martin Standing
  • Publication number: 20120288951
    Abstract: The present invention relates to the field of detection of components in gas phase, and in particular to detection of nitric oxide exhaled as a component of breath, using a liquid crystal assay format and a device utilizing liquid crystals as part of a reporting system.
    Type: Application
    Filed: April 27, 2012
    Publication date: November 15, 2012
    Applicant: PLATYPUS TECHNOLOGIES, LLC
    Inventors: Bharat Acharya, Avijit Sen, Nicholas Abbott, Kurt Kupcho
  • Patent number: 8288161
    Abstract: Articles of manufacture and methods of making and using same concern a container having an internal space and a passivated internal metal surface. The container contains a composition of an acid gas and a balance gas contained within the internal space and in contact with the passivated internal metal surface. The stability of the acid gas concentration over time is enhanced.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: October 16, 2012
    Assignee: American Air Liquide, Inc.
    Inventors: Robert Benesch, Malik Haouchine, Tracey Jacksier
  • Patent number: 8268146
    Abstract: A wellbore tool has an electrochemical sensor for measuring the amount of hydrogen sulphide or thiols in a fluid downhole in a wellbore. The sensor comprises a temperature- and pressure-resistant housing containing a flow path for the fluids. The fluids flow over one side of a gas permeable membrane the other side of the membrane being exposed to a chamber containing at least two electrodes and containing a reaction solution which together with the hydrogen sulphide or thiols create a redox reaction resulting in an electrical current dependent upon the amount of hydrogen sulphide or thiols in the fluid. Measurement is made by passing formation fluid along the flow path and repeatedly applying varying potential to one electrode and measuring the peak current flowing between that electrode and a second electrode.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: September 18, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Li Jiang, Timothy Gareth John Jones, Jonathan Webster Brown, Andrew Gilbert
  • 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: 20120149117
    Abstract: Methods and related apparatuses and mixtures are described for spectroscopic detection of hydrogen sulfide in a fluid, for example a formation fluid downhole. A reagent mixture is combined with the fluid. The reagent mixture includes metal ions for reacting with hydrogen sulfide forming a metal sulfide, and a capping agent that limits growth of the insoluble metal sulfide species by electrosteric or steric stabilization. The particle growth is one of chemical reaction or significant aggregation, and the capping agent further functionalizes the reagent mixture to exhibit properties outside the natural characteristics of the metal sulfide species to allow for spectroscopic detection of the metal sulfide species. The combined mixture and fluid is then spectroscopically interrogated to detect the presence of the metal sulfide thereby indicating the presence of hydrogen sulfide in the fluid. The mixture also includes chelating ligands for sustaining thermal endurance of the mixture under downhole conditions.
    Type: Application
    Filed: December 13, 2010
    Publication date: June 14, 2012
    Applicant: Schlumberger Technology Corporation
    Inventors: Jimmy Lawrence, Ronald van Hal, Jane Lam
  • Publication number: 20110287551
    Abstract: A sensor made from a metal salt film, formed on a set of monitoring electrodes, by evaporation of a metal salt aqueous solution disposed on the electrodes, is used for detecting a weak acid. Low concentrations of the weak acid, such as ten ppm, are indicated as the conductivity of the film changes by several orders of magnitude, as a result of reaction of the weak acid with the metal salt, as the metal salt converts to a metal reaction product upon exposure to the weak acid.
    Type: Application
    Filed: July 27, 2011
    Publication date: November 24, 2011
    Inventors: Bruce H. Weiller, Richard B. Kaner, Shabnam Virji
  • Patent number: 8058071
    Abstract: Methods and related apparatuses and mixtures are described for detecting hydrogen sulfide in a formation fluid downhole. A detection mixture is combined with the formation fluid downhole. The detection mixture includes metal ions for reacting with hydrogen sulfide forming a metal sulfide, and charged nanoparticles sized so as to inhibit significant aggregation of the metal sulfide so as to enable spectroscopic detection of the metal sulfide downhole. The combined mixture and formation fluid is then spectroscopically interrogated so as to detect the presence of the metal sulfide thereby indicating the presence of hydrogen sulfide in the formation fluid. The mixture also includes chelating ligands for sustaining thermal endurance of the mixture under downhole conditions.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: November 15, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Li Jiang, Oliver C. Mullins, Gale H. Gustavson, Christopher Harrison, Bhavani Raghuraman, Ronald E. G. Van Hal, Jimmy Lawrence, Kosta Ladavac, Albert Ballard Andrews, Timothy Gareth John Jones, Rogerio Tadeu Ramos
  • Patent number: 7959864
    Abstract: Methods and related apparatuses and mixtures are described for detecting hydrogen sulfide in a formation fluid downhole. A detection mixture is combined with the formation fluid downhole. The detection mixture includes metal ions for reacting with hydrogen sulfide forming a metal sulfide, and charged nanoparticles sized so as to inhibit significant aggregation of the metal sulfide so as to enable spectroscopic detection of the metal sulfide downhole. The combined mixture and formation fluid is then spectroscopically interrogated so as to detect the presence of the metal sulfide thereby indicating the presence of hydrogen sulfide in the formation fluid. The mixture also includes chelating ligands for sustaining thermal endurance of the mixture under downhole conditions.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: June 14, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Li Jiang, Oliver C. Mullins, Gale H. Gustavson, Christopher Harrison, Bhavani Raghuraman, Ronald E. G. Van Hal, Jimmy Lawrence, Kosta Ladavac, A. Ballard Andrews, Timothy Gareth John Jones, Rogerio Tadeu Ramos
  • Patent number: 7939334
    Abstract: A process for simultaneous assay of chlorides and sulfides by low pressure ion exclusion chromatography is provided, and in said process an analytic apparatus comprising a sampling valve, a sampling loop, an ion exclusion column and an analytic detection flow path is used, and said process comprises the following steps: (1) in the analytic detection flow path, the mixture of developer R1 and developer R2 mixes with Eluent C and then enters into a reactor, and the mixing is continued under heating.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: May 10, 2011
    Assignee: Sichuan University
    Inventors: Xinshen Zhang, Lingyun Yu, Xiaoping Jiang
  • Patent number: 7714593
    Abstract: A sensor arrangement for a sensor arrangement remotely readable by radio frequencies. The sensor arrangement includes an LC resonator that includes a capacitor and a coil, and a sensor element coupled to the LC resonator whose properties change as a function of a measurable quantity. A sensor element according to the invention does not form a direct galvanic contact with the LC resonator, rather the coupling is implemented capacitively or inductively.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: May 11, 2010
    Assignee: UPM-Kymmene Corporation
    Inventors: Timo Varpula, Heikki Seppä, Juha-Matti Saari
  • Patent number: 7666685
    Abstract: This invention generally relates to a screening method for identifying compositions suitable for use in an oral composition (e.g., a confection or chewing gum product) effective for the treatment of oral cavity malodor associated with the consumption of garlic. In particular, this invention relates to a screening method for determining the ability of a composition to reduce the concentration of a sulfide or disulfide compound (e.g., diallyl disulfide) present in a model sample or solution which is representative of the oral cavity of a subject after consuming garlic, as an indicator of the effectiveness of that composition in the treatment of oral cavity malodor associated with the consumption of garlic.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: February 23, 2010
    Assignee: Wm. Wrigley Jr. Company
    Inventors: Russell A. Bazemore, Charles J. Harrison, Michael J. Greenberg
  • Publication number: 20090233888
    Abstract: The present invention relates to the treatment of a wide array of diseases and physiologic conditions based on modulating the level of hydrogen sulfide (H2S) in the body by at least partially eradicating small intestinal bacterial overgrowth (SIBO) in the gut. An H2S or lactulose breath test and/or detection of H2S or thiosulfate in the blood or urine may be used as a diagnostic and/or prognostic for assessing a systemic H2S load that exceeds a mammal's natural detoxification capacity. These tests may similarly be used to monitor the effectiveness of a therapeutic intervention for SIBO and/or the diseases or physiologic conditions whose pathology is linked thereto. Because SIBO is related to hyperhomocysteinemia, diseases and physiologic conditions that relate to hyperhomocysteinemia may further be monitored and treated in connection with the methods of the present invention.
    Type: Application
    Filed: March 23, 2006
    Publication date: September 17, 2009
    Applicant: USC STEVENS, UNIVERSITY OF SOUTHERN CALIFORNIA
    Inventor: Henry C. Lin
  • Patent number: 7390669
    Abstract: The present invention is a rapid method of determining the concentration of the major components in a chemical stream. The present invention is also a simple, low cost, device of determining the in-situ concentration of the major components in a chemical stream. In particular, the present invention provides a useful method for simultaneously determining the concentrations of sodium hydroxide, sodium sulfide and sodium carbonate in aqueous kraft pulping liquors through use of an attenuated total reflectance (ATR) tunnel flow cell or optical probe capable of producing a ultraviolet absorbency spectrum over a wavelength of 190 to 300 nm. In addition, the present invention eliminates the need for manual sampling and dilution previously required to generate analyzable samples.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: June 24, 2008
    Assignee: Georgia Tech Research Corporation
    Inventors: Jian Li, Xin Sheng Chai, Junyoung Zhu
  • Patent number: 7273561
    Abstract: An apparatus and method of determining chemical dosage required to reduce sulfides in wastewater includes providing a headspace apart from the wastewater. The temperature of the wastewater and the concentration of sulfide gas in the headspace are measured. Dissolved hydrogen sulfide gas concentrations in the wastewater are calculated from the temperature of the wastewater and the concentration of sulfide gas in said headspace. When pH is monitored, dissolved sulfide concentrations can be calculated.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: September 25, 2007
    Assignee: Waitaki Research Corporation
    Inventor: David G Palmer
  • Patent number: 7214345
    Abstract: An apparatus for measuring the reduced inorganic sulfur content of a sample. The apparatus has a reaction chamber (12) and means (14) for introducing a reducing agent that can selectively convert the reduced inorganic sulfur of a sample in the reaction chamber (12) to hydrogen sulfide. The reducing agent can be chromous chloride. The apparatus also includes means for measuring the amount of hydrogen sulfide evolved by reaction of the reducing agent with the sample and a detector for detecting when evolution of the hydrogen sulfide has reduced or ceased. The term “reduced inorganic sulfur” refers to sulfur in a form that can undergo oxidation and includes mineral sulphides and elemental sulfur.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: May 8, 2007
    Assignee: Risatec Pty Limited
    Inventors: Leigh Albert Sullivan, David Murray McConchie, Richard Bush
  • Patent number: 7201877
    Abstract: A device for detecting sulfuryl fluoride, in which the gas specimen to be examined is subjected to pyrolysis with ensuing detection of a pyrolysis product, is to be improved for the sake of achieving a mobile, economical structure. To attain this object, in a preliminary tube (1) for pyrolysis, there is a chemical layer (5) of pyrophoric iron, and as an indicator system for the pyrolysis product, a test tube (2) for hydrogen fluoride is used.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: April 10, 2007
    Assignee: Dräger Safety AG & Co. KGaA
    Inventors: Holger Bohm, Silke Guga, Andreas Mohrmann, Armin Schulten, Bernd Siemensmeyer, Katja Stern, Bettina Runge
  • Patent number: 7025138
    Abstract: The present invention relates to a method and apparatus for detection of hydrogen sulfide in downhole operations. A downhole tool is provided with a coupon adapted to react at varying degrees to exposure to concentrations of hydrogen sulfide. The downhole tool is positioned in the wellbore with the coupon(s) exposed to downhole fluids. A reaction to a change in the coupon, such as coloration, is used to determine the presence and concentration of hydrogen sulfide.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: April 11, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Andrew Loris Kurkjian, Dexter Mootoo, Wes C. Wofford, Xu Wu, Timothy G. J. Jones, Russell Kane
  • Patent number: 6962675
    Abstract: Methods, systems and sensor arrays are provided implementing techniques for detecting an analyte in a fluid. The techniques include providing a sensor array including at least a first sensor and a second sensor in an arrangement having a defined fluid flow path, exposing the sensor array to a fluid including an analyte by introducing the fluid along the fluid flow path, measuring a response for the first sensor and the second sensor, and detecting the presence of the analyte in the fluid based on a spatio-temporal difference between the responses for the first and second sensors.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: November 8, 2005
    Assignee: California Institute of Technology
    Inventors: Nathan S. Lewis, Michael S. Freund, Shawn M. Briglin
  • Patent number: 6939717
    Abstract: Described is a downhole method and apparatus for detecting hydrogen sulphide in formation fluids produced in a hydrocarbon well. The sensor system is located within or in communication with an extraction chamber used to extract hydrogen sulphide in a gaseous state from the formation fluid and preferably equipped with renewable sensing elements.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: September 6, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Li Jiang, Timothy Gareth John Jones, Oliver Clinton Mullins, Xu Wu
  • Patent number: 6767746
    Abstract: Method and apparatus used to calculate the hydrogen sulfide and carbon dioxide loading of both rich and lean amine solutions used to remove acidic gas components from sour or production gases in order to produce a sweet or sales gas for transmission purposes. The amine solution is divided into three (3) liquid streams carrying different proportions of heat stable salts, hydrogen sulfide and carbon dioxide. Conductivity measurements are made on each of the streams and are converted to acid loading values for the amine. The acid loading values of the amine are used to obtain the hydrogen sulfide and carbon dioxide loading for the amine solution.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: July 27, 2004
    Assignee: Spartan Controls Ltd.
    Inventors: Jamie Swallow, Brent Richmond Young
  • Publication number: 20040063215
    Abstract: A sulfur-detecting sensor for detecting an integrated amount of hydrogen sulfide present in a gas stream passed over the sensor, characterized in that the sensor comprises a member formed of a material which is stable to hydrogen sulfide, and having a contacting side which is brought into contact with hydrogen sulfide, and a measuring member located on the contacting side of the former member, the measuring member being formed of a material which reacts with hydrogen sulfide to yield a reaction product having an increased electrical resistance value and/or making a phase change into a phase easily scattered by the gas stream at a temperature of the vicinity of the contacting side, and allowing an integrated amount of hydrogen sulfide passed over the sensor to be measured by measuring its electrical resistance value. A sulfur-detecting device using the detecting sensor is also disclosed.
    Type: Application
    Filed: May 27, 2003
    Publication date: April 1, 2004
    Applicant: SHINKO ELECTRIC INDUSTRIES CO., LTD
    Inventors: Michio HORIUCHI, Shigeaki SUGANUMA, Misa WATANABE
  • Patent number: 6709635
    Abstract: A polymeric gas sensor utilizes a variety of electrode geometries to generate varied responses to selective gases. The characteristic response to various gases of each electrode geometry permits the construction of a gas sensor having desirable and reproducible characteristic responses to specific gases. The gas sensor array of the invention produces characteristic responses from a plurality of sensors. These responses collectively produce a characteristic response pattern that can be used for the identification of specific gases with pattern recognition techniques.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: March 23, 2004
    Assignee: California Institute of Technology
    Inventor: Martin Buehler
  • Publication number: 20030134426
    Abstract: Described is a downhole method and apparatus for detecting hydrogen sulphide in formation fluids produced in a hydrocarbon well. The sensor system is located within or in communication with an extraction chamber used to extract hydrogen sulphide in a gaseous state from the formation fluid and preferably equipped with renewable sensing elements.
    Type: Application
    Filed: December 2, 2002
    Publication date: July 17, 2003
    Inventors: Li Jiang, Timothy Gareth John Jones, Oliver Clinton Mullins, Xu Wu
  • Publication number: 20030074951
    Abstract: Semiconductor gas-sensitive materials of the formula Cr2−xTixO3 where 0.05>x≧0.0001, and gas sensors formed therefrom.
    Type: Application
    Filed: November 12, 2002
    Publication date: April 24, 2003
    Inventors: David Edward Williams, Keith Francis Edwin Pratt, Peter John Smith, Dirk Niemeyer
  • Publication number: 20030022386
    Abstract: Method and apparatus used to calculate the hydrogen sulfide and carbon dioxide loading of both rich and lean amine solutions used to remove acidic gas components from sour or production gases in order to produce a sweet or sales gas for transmission purposes. The amine solution is divided into three(3) liquid streams carrying different proportions of heat stable salts, hydrogen sulfide and carbon dioxide. Conductivity measurements are made on each of the streams and are converted to acid loading values for the amine. The acid loading values of the amine are used to obtain the hydrogen sulfide and carbon dioxide loading for the amine solution.
    Type: Application
    Filed: July 30, 2001
    Publication date: January 30, 2003
    Applicant: SPARTAN CONTROLS LTD.
    Inventors: Jamie Swallow, Brent Richmond Young
  • Patent number: 6340596
    Abstract: A reagent composition for measuring hydrogen sulfide, which comprises an aniline derivative represented by the general formula (I): wherein R1 and R2 independently represent a substituted or unsubstituted C2-C6 alkyl group, and R3 and R4 independently represent a hydrogen atom, a C1-C6 alkyl group or a halogen atom; and an oxidizing agent, as well as a method for measuring hydrogen sulfide in a sample using the aniline derivative represented by the general formula (I) above.
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: January 22, 2002
    Assignee: Fujirebio Inc.
    Inventor: Masami Sugiyama
  • Publication number: 20010056246
    Abstract: The invention refers to a colorimetric sensor of halitosis, sensitive to volatile sulphur compounds. Said sensor comprises a solid support and a redox calorimetric reagent sensitive to volatile sulphur compounds.
    Type: Application
    Filed: January 17, 2001
    Publication date: December 27, 2001
    Inventors: Julio Rodriguez-Fernandez, Regina Lopez-Fernandez, Rosario Pereiro-Garcia, Alfredo Sanz-Medel
  • Patent number: 6322750
    Abstract: The present disclosure is a tape responsive to gases. One version is paper impregnated with lead acetate, a backing layer of impervious sheet material, and a top face pervious, transparent layer. The top layer retards gas exposure and expands the range of sensitivity. The top layer is preferably pervious, transparent and has a thickness and width to control exposure.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: November 27, 2001
    Inventor: L. Harvey Barclay
  • Patent number: 6319722
    Abstract: The method measures hydrogen sulfide concentrations in hydride gases in a sealed vessel. The sealed vessel has a gas inlet to receive a stream of hydride gas, a gas outlet to remove the stream of hydride gas and a metal acetate substrate. The stream of hydride gas contains a concentration of hydrogen sulfide gas. Introducing the stream of hydride gas through the gas inlet contacts the acetate substrate with the stream of hydride gas. Reacting the hydrogen sulfide gas contained in the stream of hydride gas with the acetate substrate modifies optical properties of the acetate substrate. Then measuring the optical properties of the acetate substrate determines the concentration of the hydrogen sulfide gas contained in the stream of hydride gas.
    Type: Grant
    Filed: March 24, 1999
    Date of Patent: November 20, 2001
    Assignee: Praxair Technology, Inc.
    Inventors: Michael Mark Litwin, Sateria Salim, John Burnham Goddard