Patents by Inventor Johna Leddy

Johna Leddy 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).

  • Publication number: 20100178537
    Abstract: The present invention is directed to methods for making magnetically modified electrodes and electrodes made according to the method. Such electrode are useful as electrodes in batteries, such as Ni-MH batteries, Ni—Cd batteries, Ni—Zn batteries and Ni—Fe batteries.
    Type: Application
    Filed: December 31, 2009
    Publication date: July 15, 2010
    Inventors: Johna Leddy, Pengcheng Zou
  • Publication number: 20100173068
    Abstract: The present invention is directed to methods for making magnetically modified electrodes and electrodes made according to the method. Such electrode are useful as electrodes in batteries, such as Ni-MH batteries, Ni—Cd batteries, Ni—Zn batteries and Ni—Fe batteries.
    Type: Application
    Filed: December 31, 2009
    Publication date: July 8, 2010
    Inventors: Johna LEDDY, Pengcheng Zou
  • Patent number: 7709115
    Abstract: The present invention is directed to methods for making magnetically modified electrodes and electrodes made according to the method. Such electrode are useful as electrodes in batteries, such as Ni-MH batteries, Ni—Cd batteries, Ni—Zn batteries and Ni—Fe batteries.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: May 4, 2010
    Assignee: University of Iowa Research Foundation
    Inventors: Johna Leddy, Pengcheng Zou
  • Publication number: 20100092779
    Abstract: New magnetic materials and new metallic particles, new methods of making and using same, for example, to prepare magnetically modified electrodes and fuel cells, and coated metallic particles in general. The present invention discloses methods of preparation of cheaper and more uniformly sized magnetic and metallic microparticles formed from the exemplary materials magnetite, nickel, samarium cobalt and neodymium iron boron. In addition, the present invention discloses methodology for preparation and use of coated magnetic and metallic microparticles, in particular, exemplary siloxyl coating of magnetic particles, metallic particles, and magnetic and metallic microparticles with an exemplary silane, 3-aminopropyltrimethoxysilane, that is cross linked thereon. In addition, methods and results are described for preparing and using larger siloxyl coated samarium cobalt milliparticles.
    Type: Application
    Filed: August 7, 2009
    Publication date: April 15, 2010
    Inventors: Johna LEDDY, Shelley D. Minteer, Wayne L. Gellett
  • Patent number: 7691638
    Abstract: The present invention is directed to methods for determining electron transfer rates in systems involving metalloproteins. Metalloprotein/substrate electron transfer rates as well as metalloprotein self exchange rates may be modeled. Such electron transfer rates are useful in smart drug design and enzyme engineering.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: April 6, 2010
    Assignee: University of Iowa Research Foundation
    Inventors: Johna Leddy, Shelley D. Minteer
  • Patent number: 7585543
    Abstract: New magnetic materials and new metallic particles, new methods of making and using same, for example, to prepare magnetically modified electrodes and fuel cells, and coated metallic particles in general. The present invention discloses methods of preparation of cheaper and more uniformly sized magnetic and metallic microparticles formed from the exemplary materials magnetite, nickel, samarium cobalt and neodymium iron boron. In addition, the present invention discloses methodology for preparation and use of coated magnetic and metallic microparticles, in particular, exemplary siloxyl coating of magnetic particles, metallic particles, and magnetic and metallic microparticles with an exemplary silane, 3-aminopropyltrimethoxysilane, that is cross linked thereon. In addition, methods and results are described for preparing and using larger siloxyl coated samarium cobalt milliparticles.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: September 8, 2009
    Assignee: University of Iowa Research Foundation
    Inventors: Johna Leddy, Shelley D. Minteer, Wayne L. Gellett
  • Publication number: 20080314116
    Abstract: A method of diagnosing the health of an individual by collecting a breath sample from the individual and measuring the amount of each of a plurality of analytes in the sample. The amount of each analytes is measured by fitting a time response curve of a sample-evaluation fuel cell in which the fuel cell sample electrode is contacted with the sample with the analysis based on a function of standard time response curves for an equivalent fuel cell configuration obtained separately for each of the analytes on a fuel cell with equivalent construction as sample-evaluation fuel cell. Each of the plurality of analytes is generally indicative of an aspect of the individual's health. Suitable analytes include, for example, inorganic compounds as well as compositions that exhibit negative reduction reactions at least for a portion of the time response curve.
    Type: Application
    Filed: August 14, 2008
    Publication date: December 25, 2008
    Inventors: Johna Leddy, Luke M. Haverhals
  • Publication number: 20080302170
    Abstract: A method of diagnosing the health of an individual by collecting a breath sample from the individual and measuring the amount of each of a plurality of analytes in the sample. The amount of each analytes is measured by fitting a time response curve of a sample-evaluation fuel cell in which the fuel cell sample electrode is contacted with the sample with the analysis based on a function of standard time response curves for an equivalent fuel cell configuration obtained separately for each of the analytes on a fuel cell with equivalent construction as sample-evaluation fuel cell. Each of the plurality of analytes is generally indicative of an aspect of the individual's health. Suitable analytes include, for example, inorganic compounds as well as compositions that exhibit negative reduction reactions at least for a portion of the time response curve.
    Type: Application
    Filed: August 14, 2008
    Publication date: December 11, 2008
    Inventors: Johna Leddy, Luke M. Haverhals
  • Publication number: 20080295573
    Abstract: A method of diagnosing the health of an individual by collecting a breath sample from the individual and measuring the amount of each of a plurality of analytes in the sample. The amount of each analytes is measured by fitting a time response curve of a sample-evaluation fuel cell in which the fuel cell sample electrode is contacted with the sample with the analysis based on a function of standard time response curves for an equivalent fuel cell configuration obtained separately for each of the analytes on a fuel cell with equivalent construction as sample-evaluation fuel cell. Each of the plurality of analytes is generally indicative of an aspect of the individual's health. Suitable analytes include, for example, inorganic compounds as well as compositions that exhibit negative reduction reactions at least for a portion of the time response curve.
    Type: Application
    Filed: August 14, 2008
    Publication date: December 4, 2008
    Inventors: Johna Leddy, Luke M. Haverhals
  • Patent number: 7421882
    Abstract: A method of diagnosing the health of an individual by collecting a breath sample from the individual and measuring the amount of each of a plurality of analytes in the sample. The amount of each analytes is measured by fitting a time response curve of a sample-evaluation fuel cell in which the fuel cell sample electrode is contacted with the sample with the analysis based on a function of standard time response curves for an equivalent fuel cell configuration obtained separately for each of the analytes on a fuel cell with equivalent construction as sample-evaluation fuel cell. Each of the plurality of analytes is generally indicative of an aspect of the individual's health. Suitable analytes include, for example, inorganic compounds as well as compositions that exhibit negative reduction reactions at least for a portion of the time response curve.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: September 9, 2008
    Assignee: University of Iowa Research Foundation
    Inventors: Johna Leddy, Luke M. Haverhals
  • Publication number: 20070254206
    Abstract: Improved supported catalyst compositions including metalated carbon nitrides and methods of preparation are disclosed.
    Type: Application
    Filed: January 17, 2007
    Publication date: November 1, 2007
    Inventors: Edward Gillan, Dale Miller, Drew Dunwoody, Johna Leddy
  • Publication number: 20070056849
    Abstract: An electrically conducting electrode having a composite and a current collector in electrical contact with the composite, the composite can comprise at least about 10 weight percent electrically conductive particles, at least about 0.5 weight percent magnetic particles, and an optional polymeric binder, wherein composite is at least about 80 weight percent with respect to the combined weight of the electrically conductive particles, the magnetic particles and the binder. Electrochemical systems can effectively use these electrodes to improve system performance.
    Type: Application
    Filed: April 17, 2006
    Publication date: March 15, 2007
    Inventors: Johna Leddy, Angela Wolf, Drew Dunwoody, Wayne Gellett, Murat Unlu
  • Publication number: 20070009771
    Abstract: Battery electrodes with desirable discharge performance comprise manganese oxide and magnetic particles. Corresponding power cells have improved specific discharge capacities. Furthermore, magnetically modified manganese dioxide electrodes are found to have significantly improved cycling properties that suggest the possibility for improved performance secondary batteries.
    Type: Application
    Filed: February 8, 2006
    Publication date: January 11, 2007
    Inventors: Johna Leddy, Joseph Tesene
  • Publication number: 20060130557
    Abstract: A method of diagnosing the health of an individual by collecting a breath sample from the individual and measuring the amount of each of a plurality of analytes in the sample. The amount of each analytes is measured by fitting a time response curve of a sample-evaluation fuel cell in which the fuel cell sample electrode is contacted with the sample with the analysis based on a function of standard time response curves for an equivalent fuel cell configuration obtained separately for each of the analytes on a fuel cell with equivalent construction as sample-evaluation fuel cell. Each of the plurality of analytes is generally indicative of an aspect of the individual's health. Suitable analytes include, for example, inorganic compounds as well as compositions that exhibit negative reduction reactions at least for a portion of the time response curve.
    Type: Application
    Filed: December 16, 2005
    Publication date: June 22, 2006
    Inventors: Johna Leddy, Luke Haverhals
  • Patent number: 7041401
    Abstract: Disclosed are magnetically modified electrodes containing at least one catalyst component that mediates a subatomic particle transfer process. Also disclosed are magnetically modified electrodes containing metalloproteins (metalloenzymes).
    Type: Grant
    Filed: October 20, 2003
    Date of Patent: May 9, 2006
    Assignee: University of Iowa Research Foundation
    Inventors: Johna Leddy, Chaminda Hettige
  • Publication number: 20050213187
    Abstract: The present invention is directed to methods for making magnetically modified electrodes and electrodes made according to the method. Such electrode are useful as electrodes in batteries, such as Ni-MH batteries, Ni—Cd batteries, Ni—Zn batteries and Ni—Fe batteries.
    Type: Application
    Filed: May 17, 2005
    Publication date: September 29, 2005
    Inventors: Johna Leddy, Shelley Minteer
  • Publication number: 20050214169
    Abstract: Amounts of volatile organic compositions can be evaluated from vapor samples based on the time dependent response of a fuel cell contacted with the vapor sample at its anode. The time response of the fuel cell signal, e.g., voltage or current, is de-convoluted using a set of standard curves for an equivalent fuel cell configuration obtained separately for each of the volatile organic compositions of a fuel cell with an equivalent construction as the sample-evaluation fuel cell. The methodology can be implemented on a system with an appropriate vapor collection device suitable for the particular application. The method and system can be used to analyze breath samples to evaluate ethanol levels or other volatile organic composition. The system can be a breathalyzer, a vehicle interlock, a medical analysis device or a sensor of environmental or industrial interest.
    Type: Application
    Filed: March 25, 2005
    Publication date: September 29, 2005
    Inventors: Johna Leddy, Luke Haverhals
  • Patent number: 6949179
    Abstract: The present invention is directed to methods for making magnetically modified electrodes and electrodes made according to the method. Such electrode are useful as electrodes in batteries, such as Ni-MH batteries, Ni—Cd batteries, Ni—Zn batteries and Ni—Fe batteries.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: September 27, 2005
    Assignee: University of Iowa Research Foundation
    Inventors: Johna Leddy, Shelley D. Minteer
  • Patent number: 6890670
    Abstract: The present invention is directed to methods for making magnetically modified electrodes and electrodes made according to the method. Such electrodes are useful as electrodes in batteries, such as Ni-MH batteries, Ni—Cd batteries, Ni—Zn batteries and Ni—Fe batteries.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: May 10, 2005
    Assignee: University of Iowa Research Foundation
    Inventors: Johna Leddy, Pengcheng Zou
  • Publication number: 20050084741
    Abstract: Disclosed are self-hydrating membrane electrode assemblies (MEAs), including MEAs that have been magnetically modified, and to methods of manufacture of the same, as well as fuel cells that require only a self-hydrating MEA and a source of fuel.
    Type: Application
    Filed: October 15, 2003
    Publication date: April 21, 2005
    Inventors: Johna Leddy, Wayne Gellett, Drew Dunwoody