Patents by Inventor Gary W. Hunter

Gary W. Hunter 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: 20200271498
    Abstract: Provided herein are improved methods for estimating the flow velocity of a fluid in a vessel. Systems and methods are provided herein related to making and/or refining velocity measurements for flowing fluids, both single and multi-phase fluids, in vessels, such as pipes or conduits, utilizing contrast media property agent variations.
    Type: Application
    Filed: February 5, 2020
    Publication date: August 27, 2020
    Inventors: KENNETH W. DESMOND, GARY L. HUNTER
  • Publication number: 20200271497
    Abstract: Provided herein are improved methods for estimating the flow velocity of a fluid in a vessel. Systems and methods are provided herein related to making and/or refining velocity measurements for flowing fluids, both single and multi-phase fluids, in vessels, such as pipes or conduits, utilizing contrast media property agent variations.
    Type: Application
    Filed: February 5, 2020
    Publication date: August 27, 2020
    Inventors: KENNETH W. DESMOND, GARY L. HUNTER
  • Patent number: 10732161
    Abstract: Systems, methods, and other embodiments associated with gas detecting sensors. According to one embodiment, a gas sensor includes a metal layer, a barrier interlayer, a substrate layer, a first insulating layer, a conduction path, a contact pad, and a second insulating layer. The conduction path connects the metal layer to the contact pad. The second insulating layer prevents diffusion through the contact pad, the conduction path, or the metal layer. The sensor includes a wire bonded electrical connection to the contact pad such that voltage can be determined and/or applied.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: August 4, 2020
    Assignee: United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Jennifer Xu, Gary W. Hunter
  • Patent number: 10444180
    Abstract: A polymer electrolyte-based sensor is disclosed. The sensor includes a conductive polymer electrolyte film including water-retaining components. The water-retaining components facilitate operational conductivity of the conductive polymer electrolyte film in lower humidity environments than would be possible without the water-retaining components.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: October 15, 2019
    Assignee: United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Gary W Hunter, Jennifer C Xu, Chung-Chiun Liu
  • Publication number: 20190154482
    Abstract: Systems and methods are provided for estimating the flow velocity of a multi-phase flow in a pipe using injected microbubbles in combination with ultrasonic signals produced by transducers external to the pipe. The transducers can be located so that one transducer/receiver pair is downstream from a second pair by a separation distance. The receivers can preferably be located in alignment with the transducers for receiving a desirable amount of signal emitted from microbubbles that are excited by absorption of energy from a signal generated by a transducer. The frequency of the signal emitted by the microbubbles can correspond to a harmonic and/or sub-harmonic of the frequency of the signal generated by the transducer. In order to improve the signal-to-noise ratio, frequencies corresponding to a primary frequency emitted by a transducer can be filtered out.
    Type: Application
    Filed: November 14, 2018
    Publication date: May 23, 2019
    Inventors: Kenneth W. Desmond, Gary L. Hunter
  • Publication number: 20190154479
    Abstract: Systems and methods are provided for estimating the flow velocity of a multi-phase flow using signals of different frequencies. The signals can correspond to any convenient type of signal that interacts with contrast agents in the multi-phase flow, such as acoustic signals or electromagnetic signals. The signal emitters can be located so that one emitter/receiver pair is downstream from a second pair by a separation distance. The receivers can preferably be located in sufficient alignment with the emitters to receive a transmitted portion of the emitter signal after any scattering or attenuation from the contrast agents in the multi-phase fluid. The emitters can be configured to generate signals of different frequencies.
    Type: Application
    Filed: November 14, 2018
    Publication date: May 23, 2019
    Inventors: Kenneth W. Desmond, Gary L. Hunter
  • Patent number: 10294099
    Abstract: A microsensor and its method of manufacture are disclosed based on templated metal or metal oxide nanostructures. The microsensor includes an electrode that in one embodiment may be configured as a first sawtooth patterned electrode having a series of first peaks and first valleys and a second electrode that by be configured as a second sawtooth patterned electrode having a series of second peaks and second valleys where the second peaks generally align with the first peaks of the first electrode. A plurality of templated metal or metal oxide nanostructures connect on one side to the first electrode and on another side to the second electrode, where an electrical property of the microsensor changes in response to exposure to an environment to be monitored.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: May 21, 2019
    Assignee: The United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Azlin M. Biaggi-Labiosa, Gary W. Hunter
  • Publication number: 20180321210
    Abstract: Systems, methods, and other embodiments associated with gas detecting sensors. According to one embodiment, a gas sensor includes a metal layer, a barrier interlayer, a substrate layer, a first insulating layer, a conduction path, a contact pad, and a second insulating layer. The conduction path connects the metal layer to the contact pad. The second insulating layer prevents diffusion through the contact pad, the conduction path, or the metal layer. The sensor includes a wire bonded electrical connection to the contact pad such that voltage can be determined and/or applied.
    Type: Application
    Filed: May 4, 2018
    Publication date: November 8, 2018
    Inventors: Jennifer Xu, Gary W. Hunter
  • Patent number: 9970914
    Abstract: Systems, methods, and other embodiments associated with gas detecting sensors. According to one embodiment, a gas sensor includes a metal layer, a barrier interlayer, a substrate layer, a first insulating layer, a conduction path, a contact pad, and a second insulating layer. The conduction path connects the metal layer to the contact pad. The second insulating layer prevents diffusion through the contact pad, the conduction path, or the metal layer. The sensor includes a wire bonded electrical connection to the contact pad such that voltage can be determined and/or applied.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: May 15, 2018
    Assignee: The United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Jennifer Xu, Gary W. Hunter
  • Publication number: 20180088077
    Abstract: Various embodiments of a gas sensor device and method of fabricating a gas sensor device are provided. In one embodiment a gas sensor device includes a base substrate, an electrolyte layer disposed on the base substrate and a plurality of potentiometric sensor units electrically coupled to the base substrate. Each potentiometric sensor unit includes an electrolyte layer disposed on the base substrate, a sensing electrode comprising tungsten oxide (WO3)and platinum (Pt), a reference electrode comprising Pt, and a plurality of connectors coupled to the plurality of potentiometric sensors to connect the plurality of potentiometric sensors in series.
    Type: Application
    Filed: September 29, 2017
    Publication date: March 29, 2018
    Inventors: Gary W. Hunter, Carl W. Chang, Prabir K. Dutta, Suvra P. Mondal, Azlin M. Biaggi-Labiosa, Daniel Laskowski, Raed Dweik
  • Patent number: 8877636
    Abstract: Systems and methods that incorporate nanostructures into microdevices are discussed herein. These systems and methods can allow for standard microfabrication techniques to be extended to the field of nanotechnology. Sensors incorporating nanostructures can be fabricated as described herein, and can be used to reliably detect a range of gases with high response.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: November 4, 2014
    Assignee: The United States of America as Represented by the Adminstrator of National Aeronautics and Space Administration
    Inventors: Gary W Hunter, Jennifer C Xu, Laura J Evans, Michael H Kulis, Gordon M Berger, Randall L Vander Wal
  • Publication number: 20140262835
    Abstract: Various embodiments of a gas sensor device and method of fabricating a gas sensor device are provided. In one embodiment a gas sensor device includes a base substrate, an electrolyte layer disposed on the base substrate and a plurality of potentiometric sensor units electrically coupled to the base substrate. Each potentiometric sensor unit includes an electrolyte layer disposed on the base substrate, a sensing electrode comprising tungsten oxide (WO3) and platinum (Pt), a reference electrode comprising Pt, and a plurality of connectors coupled to the plurality of potentiometric sensors to connect the plurality of potentiometric sensors in series.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: THE CLEVELAND CLINIC FOUNDATION
    Inventors: Gary W. Hunter, Carl W. Chang, Prabir K. Dutta, Suvra P. Mondal, Azlin M. Biaggi-Labiosa
  • Patent number: 8702962
    Abstract: A gas sensor comprises a substrate layer; a pair of interdigitated metal electrodes, said electrodes include upper surfaces, the electrodes selected from the group consisting of Pt, Pd, Au, Ir, Ag, Ru, Rh, In, Os, and their alloys. A first layer of solid electrolyte staying in between electrode fingers and partially on said upper surfaces of said electrodes, said first layer selected from NASICON, LISICON, KSICON and ??-Alumina. A second layer of metal carbonate(s) as an auxiliary electrolyte engaging said upper surfaces of the electrodes and the first solid electrolyte. The metal carbonates selected from the group consisting of the following ions Na+, K+, Li+, Ag+, H+, Pb2+, Sr2+, Ba2+, and any combination thereof.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: April 22, 2014
    Assignee: The United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Gary W. Hunter, Jennifer C. Xu
  • Publication number: 20120263870
    Abstract: A gas sensor includes a substrate and a pair of interdigitated metal electrodes selected from the group consisting of Pt, Pd, Au, Ir, Ag, Ru, Rh, In, and Os. The electrodes each include an upper surface. A first solid electrolyte resides between the interdigitated electrodes and partially engages the upper surfaces of the electrodes. The first solid electrolyte is selected from the group consisting of NASICON, LISICON, KSICON, and ??-Alumina (beta prime-prime alumina in which when prepared as an electrolyte is complexed with a mobile ion selected from the group consisting of Na+, K+, Li+, Ag+, H+, Pb2+, Sr2+ or Ba2+). A second electrolyte partially engages the upper surfaces of the electrodes and engages the first solid electrolyte in at least one point. The second electrolyte is selected from the group of compounds consisting of Na+, K+, Li+, Ag+, H+, Pb2+, Sr2+ or Ba2+ ions or combinations thereof.
    Type: Application
    Filed: October 7, 2011
    Publication date: October 18, 2012
    Inventors: Gary W. Hunter, Jennifer C. Xu, Chung Chiun Liu, Benjamin C. Ward
  • Patent number: 8052854
    Abstract: A gas sensor includes a substrate and a pair of interdigitated metal electrodes selected from the group consisting of Pt, Pd, Au, Ir, Ag, Ru, Rh, In, and Os. The electrodes each include an upper surface. A first solid electrolyte resides between the interdigitated electrodes and partially engages the upper surfaces of the electrodes. The first solid electrolyte is selected from the group consisting of NASICON, LISICON, KSICON, and ??-Alumina (beta prime-prime alumina in which when prepared as an electrolyte is complexed with a mobile ion selected from the group consisting of Na+, K+, Li+, Ag+, H+, Pb2+, Sr2+ or Ba2+). A second electrolyte partially engages the upper surfaces of the electrodes and engages the first solid electrolyte in at least one point. The second electrolyte is selected from the group of compounds consisting of Na+, K+, Li+, Ag+, H+, Pb2+, Sr2+ or Ba2+ ions or combinations thereof.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: November 8, 2011
    Assignee: The United States of America as represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Gary W. Hunter, Jennifer C. Xu, Chung Chiun Liu, Benjamin J. Ward
  • Patent number: 8001828
    Abstract: A miniaturized Schottky diode hydrogen and hydrocarbon sensor and the method of making same is disclosed and claimed. The sensor comprises a catalytic metal layer, such as palladium, a silicon carbide substrate layer and a thin barrier layer in between the catalytic and substrate layers made of palladium oxide (PdOx ). This highly stable device provides sensitive gas detection at temperatures ranging from at least 450 to 600° C. The barrier layer prevents reactions between the catalytic metal layer and the substrate layer. Conventional semiconductor fabrication techniques are used to fabricate the small-sized sensors. The use of a thicker palladium oxide barrier layer for other semiconductor structures such as a capacitor and transistor structures is also disclosed.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: August 23, 2011
    Assignee: The United States of America as represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Gary W. Hunter, Jennifer C. Xu, Dorothy Lukco
  • Publication number: 20090113992
    Abstract: A miniaturized Schottky diode hydrogen and hydrocarbon sensor and the method of making same is disclosed and claimed. The sensor comprises a catalytic metal layer, such as palladium, a silicon carbide substrate layer and a thin barrier layer in between the catalytic and substrate layers made of palladium oxide (PdOx). This highly stable device provides sensitive gas detection at temperatures ranging from at least 450 to 600° C. The barrier layer prevents reactions between the catalytic metal layer and the substrate layer. Conventional semiconductor fabrication techniques are used to fabricate the small-sized sensors. The use of a thicker palladium oxide barrier layer for other semiconductor structures such as a capacitor and transistor structures is also disclosed.
    Type: Application
    Filed: June 20, 2008
    Publication date: May 7, 2009
    Inventors: Gary W. Hunter, Jennifer C. Xu, Dorothy Lukco
  • Patent number: 7389675
    Abstract: A miniaturized Schottky diode hydrogen and hydrocarbon sensor and the method of making same is disclosed and claimed. The sensor comprises a catalytic metal layer, such as palladium, a silicon carbide substrate layer and a thin barrier layer in between the catalytic and substrate layers made of palladium oxide (PdOx). This highly stable device provides sensitive gas detection at temperatures ranging from at least 450 to 600° C. The barrier layer prevents reactions between the catalytic metal layer and the substrate layer. Conventional semiconductor fabrication techniques are used to fabricate the small-sized sensors. The use of a thicker palladium oxide barrier layer for other semiconductor structures such as a capacitor and transistor structures is also disclosed.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: June 24, 2008
    Assignee: The United States of America as represented by the National Aeronautics and Space Administration
    Inventors: Gary W. Hunter, Jennifer C. Xu, Dorothy Lukco
  • Patent number: 6763699
    Abstract: Gas sensor devices are provided having an atomically flat silicon carbide top surface that, in turn, provides for a uniform, and reproducible surface thereof.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: July 20, 2004
    Assignee: The United States of America as represented by the Administrator of Natural Aeronautics and Space Administration
    Inventors: Gary W. Hunter, Philip G. Neudeck
  • Patent number: 5668301
    Abstract: A hydrogen sensitive metal alloy contains palladium and titanium to provide a larger change in electrical resistance when exposed to the presence of hydrogen. The alloy is deposited on a substrate and a thin film and connected across electrical circuitry to provide a sensor device that can be used for improved sensitivity and accuracy of hydrogen detection.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: September 16, 1997
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Gary W. Hunter