Patents by Inventor Emory S. De Castro

Emory S. De Castro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9997791
    Abstract: The present invention relates to membrane electrode units (MEU) for high temperature fuel cells having an improved stability and a process for their manufacture.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: June 12, 2018
    Assignee: BASF SE
    Inventors: Sigmar Bräuninger, Detlef Ott, Jörg Belack, Moritz Ehrenstein, Seonghan Yu, Andrew Van Dyke, Emory S. De Castro
  • Publication number: 20150064599
    Abstract: The present invention relates to membrane electrode units (MEU) for high temperature fuel cells having an improved stability and a process for their manufacture.
    Type: Application
    Filed: August 29, 2014
    Publication date: March 5, 2015
    Applicant: BASF SE
    Inventors: Sigmar Bräuninger, Detlef Ott, Jörg Belack, Moritz Ehrenstein, Seonghan Yu, Andrew Van Dyke, Emory S. De Castro
  • Patent number: 8372775
    Abstract: A method of producing a catalyst for oxygen reduction and a gas diffusion electrode.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: February 12, 2013
    Assignee: Industrie de Nora S.p.A.
    Inventors: Andrea F. Gulla, Robert J. Allen, Emory S. De Castro
  • Patent number: 7923172
    Abstract: An improved structure for gas diffusion electrodes and gas diffusion layers whereby fine gradients of porosity and hydrophobicity promote efficient gas transport, water removal and overall enhanced performance of Membrane Electrode Assemblies constructed with these components.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: April 12, 2011
    Assignee: BASF Fuel Cell GmbH
    Inventors: Emory S. De Castro, Yu-Min Tsou, Maria Josefina Cayetano, Jeffrey G. Morse, Michael Schneider, Hua Deng
  • Patent number: 7879753
    Abstract: Ruthenium sulfide catalyst and gas diffusion electrodes incorporating the same for reduction of oxygen in industrial electrolyzers which catalyst is highly resistant to corrosion making it useful for oxygen-depolarized aqueous hydrochloric acid electrolysis.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: February 1, 2011
    Assignee: Industrie de Nora S.p.A.
    Inventors: Andrea F. Gulla, Robert J. Allen, Emory S. De Castro
  • Patent number: 6855660
    Abstract: A rhodium sulfide electrocatalyst formed by heating an aqueous solution of rhodium salt until a steady state distribution of isomers is obtained and then sparging hydrogen sulfide into the solution to form the rhodium sulfide and a membrane electrode assembly with the said electrode and a process for electrolyzing hydrochloric acid.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: February 15, 2005
    Assignee: De Nora Elettrodi S.p.A.
    Inventors: Yu-Min Tsou, Hua Deng, Gian Nicola Martelli, Robert J. Allen, Emory S. De Castro
  • Publication number: 20040242412
    Abstract: Ruthenium sulfide catalyst and gas diffusion electrodes incorporating the same for reduction of oxygen in industrial electrolyzers which catalyst is highly resistant to corrosion making it useful for oxygen-depolarized aqueous hydrochloric acid electrolysis.
    Type: Application
    Filed: April 22, 2004
    Publication date: December 2, 2004
    Inventors: Andrea F. Gulla, Robert J. Allen, Emory S. De Castro
  • Publication number: 20030086862
    Abstract: A rhodium sulfide electrocatalyst formed by heating an aqueous solution of rhodium salt until a steady state distribution of isomers is obtained and then sparging hydrogen sulfide into the solution to form the rhodium sulfide and a membrane electrode assembly with the said electrode and a process for electrolyzing hydrochloric acid.
    Type: Application
    Filed: May 8, 2002
    Publication date: May 8, 2003
    Inventors: Yu-Min Tsou, Hua Deng, Gian Nicola Martelli, Robert J. Allen, Emory S. De Castro
  • Patent number: 6444602
    Abstract: Gas Diffusion Electrodes (GDEs) play a pivotal role in clean energy production as well as in electrochemical processes and sensors. These gas-consuming electrodes are typically designed for liquid electrolyte systems such as phosphoric acid and alkaline fuel cells, and are commercially manufactured by hand or in a batch process. However, GDEs using the new electrolytes such as conductive polymer membranes demand improved electrode structures. This invention pertains to GDEs and gas diffusion media with new structures for systems using membrane electrode assemblies (MEAs), and automated methods of manufacture that lend themselves to continuous mass production. Unexpected improvements in gas and vapor transport through the electrode are realized by incorporating a new dispersion process in the construction, reformulating the applied mix with solution additives, and creating a novel coating structure on a conductive web.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: September 3, 2002
    Assignee: DeNora S.p.A.
    Inventors: Michael DeMarinis, Emory S. De Castro, Robert J. Allen, Khaleda Shaikh
  • Patent number: 6402930
    Abstract: A process for electrolyzing an aqueous solution of hydrochloric acid to chlorine in an electrochemical cell provided with an anode compartment and a cathode compartment including at least one gas diffusion cathode comprising an electrically conductive web provided on at least one side thereof with a coating of a catalyst for the electroreduction of oxygen comprising rhodium sulfide and optionally containing at least one fluorinated binder incorporated therein, comprising introducing aqueous hydrochloric acid containing contaminant species into the anode compartment and oxygen into the cathode compartment while impressing a direct electric current on the cell.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: June 11, 2002
    Assignees: De Nora Elettrodi S.p.A., Bayer AG
    Inventors: Robert J. Allen, James R. Giallombardo, Daniel Czerwiec, Emory S. De Castro, Khaleda Shaikh, Fritz Gestermann, Hans-Dieter Pinter, Gerd Speer
  • Patent number: 6379834
    Abstract: This invention pertains to improved formulations of platinum-molybdenum alloys for use as anode catalysts. These electrocatalysts find utility as a constituent of gas diffusion electrodes for use in fuel cells that operate at less than 180° C. or in applications whereupon hydrogen is oxidized in the presence of carbon monoxide or other platinum inhibiting substances. The new formulations derive unexpected activity through creating highly dispersed alloy particles of up to approximately 300 Å on carbon supports. The desired activity is achieved by carefully controlling the platinum to molybdenum ratio during preparation and judiciously selecting a proper loading of alloy on the carbon support.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: April 30, 2002
    Assignee: De Nora S.p.A.
    Inventors: James R. Giallombardo, Emory S. De Castro, Robert J. Allen
  • Patent number: 6368476
    Abstract: Gas Diffusion Electrodes (GDEs) play a pivotal role in clean energy production as well as in electrochemical processes and sensors. These gas-consuming electrodes are typically designed for liquid electrolyte systems, and are commercially manufactured by hand or in a batch process. However, CDEs using the new electrolytes demand improved electrode structures. This invention pertains to GDEs and gas diffusion media with new structures for systems using membrane electrode assemblies (MEAs), and automated methods of manufacture that lend themselves to continuous mass production. Unexpected improvements in gas and vapor transport through the electrode are realized by incorporating a new dispersion process in the construction, reformulating the applied mix with solution additives, and creating a novel coating structure on a conductive web. Furthermore, combining these changes with a judicious choice in coating methodology allows one to produce these materials in a continuous, automated fashion.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: April 9, 2002
    Inventors: Michael DeMarinis, Emory S. De Castro, Robert J. Allen, Khaleda Shaikh
  • Patent number: 6358381
    Abstract: The invention relates to a novel rhodium sulfide catalyst for the reduction of oxygen in industrial electrolyzers. The catalyst is highly resistant towards corrosion and poisoning by organic species, thus resulting particularly suitable for use in aqueous hydrochloric acid electrolysis, when technical grade acid containing organic contaminants is employed.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: March 19, 2002
    Assignee: De Nora S.p.A.
    Inventors: Robert J. Allen, James R. Giallombardo, Daniel Czerwiec, Emory S. De Castro, Khaleda Shaikh
  • Patent number: 6165636
    Abstract: This invention pertains to improved formulations of platinum--molybdenum alloys for use as anode catalysts. These electrocatalysts find utility as a constituent of gas diffusion electrodes for use in fuel cells that operate at less than 180.degree. C. or in applications whereupon hydrogen is oxidized in the presence of carbon monoxide or other platinum inhibiting substances. The new formulations derive unexpected activity through creating highly dispersed alloy particles of up to approximately 300 .ANG. on carbon supports. The desired activity is achieved by carefully controlling the platinum to molybdenum ratio during preparation and judiciously selecting a proper loading of alloy on the carbon support.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: December 26, 2000
    Assignee: De Nora S.p.A.
    Inventors: James R. Giallombardo, Emory S. De Castro, Robert J. Allen
  • Patent number: 6149782
    Abstract: The invention relates to a novel rhodium sulfide catalyst for the reduction of oxygen in industrial electrolyzers. The catalyst is highly resistant towards corrosion and poisoning by organic species, thus resulting particularly suitable for use in aqueous hydrochloric acid electrolysis, when technical grade acid containing organic contaminants is employed.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: November 21, 2000
    Assignee: De Nora S.p.A
    Inventors: Robert J. Allen, James R. Giallombardo, Daniel Czerwiec, Emory S. De Castro, Khaleda Shaikh
  • Patent number: 6103077
    Abstract: Gas Diffusion Electrodes (GDES) play a pivotal role in clean energy production as well as in electrochemical processes and sensors. These gas-consuming electrodes are typically designed for liquid electrolyte systems such as phosphoric acid and alkaline fuel cells, and are commercially manufactured by hand or in a batch process. However, GDEs using the new electrolytes such as conductive polymer membranes demand improved electrode structures.This invention pertains to GDEs and gas diffusion media with new structures for systems using membrane electrode assemblies (MEAs), and automated methods of manufacture that lend themselves to continuous mass production Unexpected improvements in gas and vapor transport through the electrode are realized by incorporating a new dispersion process in the construction, reformulating the applied mix with solution additives, and creating a novel coating structure on a conductive web.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: August 15, 2000
    Assignee: De Nora S.p.A.
    Inventors: Michael DeMarinis, Emory S. De Castro, Robert J. Allen, Khaleda Shaikh
  • Patent number: 5841021
    Abstract: An electrochemical gas sensor is provided, the use of which permits quantitative measurement of volatile gas contaminants in an atmosphere being monitored, generally at ambient temperatures below 100.degree. C. The sensor is constructed of a sensor electrode and a reference electrode on a separator in such a manner as to be exposed to the atmosphere which is sensed for gaseous contaminants. In an alternative embodiment, the sensors can be covered with a selective filter which will selectively allow only small molecule toxic gases to pass for sensing by the sensor electrode while excluding larger interfering gas molecules. In another alternative embodiment, a multiple layer electrochemical gas sensor detects the presence of volatile gas contaminants in a sample gas as well as humidity, temperature, and/or pressure of the gas sample.
    Type: Grant
    Filed: September 5, 1995
    Date of Patent: November 24, 1998
    Inventors: Emory S. De Castro, J. David Genders, Norman L. Weinberg
  • Patent number: 5834626
    Abstract: Colorimetric indicators for breath, air, gas, & vapor analyses that can be thrown away after a single use, are easy to use, low cost, small, and simple to manufacture for indicating at least volume passed through the colorimetric indicators and may also be used to indicate concentration of an analyte within breath, air, gas, & vapor passed through the colorimetric indicators. The present invention is directed to colorimetric indicators for breath, air, gas, & vapor analyses. The colorimetric indicators may have a housing with an entrance port, an outlet, a volume indicator, and an analyte indicating reagent. The volume indicator may be a breath volume reagent. Different analytes may be measured, the analyte indicating reagent depending upon the particular analyte being to monitored. The breath volume indicator is colorimetric, and changes color when a predetermined volume of air is passed through the colorimetric indicators for breath, air, gas, & vapor analyses.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: November 10, 1998
    Inventors: Emory S. De Castro, Douglas R. Malat
  • Patent number: 5437772
    Abstract: Apparatus and methods for quickly and easily detecting trace amounts of metallic or non-metallic, electro-active substances, and in particular trace amounts of metals, such as lead in a portable, hand-held detector system with single potential control.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: August 1, 1995
    Assignee: The Electrosynthesis Co., Inc.
    Inventors: Emory S. De Castro, John D. Genders
  • Patent number: 5017274
    Abstract: Oxygen is extracted from a fluid mixture feedstock by circulating a carrier fluid from an oxygen loading station to an electrochemical cell. The carrier fluid includes a carrier compound capable of reversibly binding oxygen, with oxygen binding dependent on the oxidation state of the compound. Oxygen bound to the carrier compound in a first oxidation state is released as the oxidation state is altered at the first electrode of the electrochemical cell. The carrier compound is then returned to the first oxidation state at the second electrode at the electrochemical cell. The loading station typically comprises an oxygen-permeable membrane which prevents bulk mixing of the fluid mixture and the carrier fluid.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: May 21, 1991
    Assignee: Aquanautics Corporation
    Inventors: John B. Kerr, Emory S. De Castro, Bruce Zenner