Patents by Inventor K. Walker

K. Walker 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: 12290009
    Abstract: Superconducting Meissner effect transistors, methods of modulating, and systems are disclosed. In one aspect a disclosed transistor includes a superconducting bridge between a first and a second current probe, the first and second current probe being electrically connected to a source and a drain electrical connection, respectively and a control line configured to emit a magnetic field signal having signal strength Hsig at the superconducting bridge. In one aspect the emitted magnetic field is configured to break Cooper pairs in the superconducting bridge.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: April 29, 2025
    Assignee: Arizona Board of Regents on Behalf of the University of Arizona
    Inventor: Christopher K. Walker
  • Patent number: 12252983
    Abstract: A plunger lift system, as well as a method for monitoring plunger parameters within a wellbore using such a plunger lift system, are provided. The plunger lift system includes a lubricator attached to a wellhead at the surface and a plunger dimensioned to travel through the production tubing upon being released from the lubricator. The plunger lift system also includes magnetic sensor systems installed along the production tubing, where each magnetic sensor system includes a magnetic sensor for detecting the passage of the plunger as it travels through the production tubing, as well a communication device for transmitting communication signals between the magnetic sensor systems and a computing system located at the surface, where the computing system includes a processor and a non-transitory, computer-readable storage medium including computer-executable instructions that direct the processor to dynamically determine the plunger position and/or velocity based on the received communication signals.
    Type: Grant
    Filed: March 4, 2024
    Date of Patent: March 18, 2025
    Assignee: ExxonMobil Technology and Engineering Company
    Inventors: Michael C. Romer, Michael C. Tschauner, Christopher C. Frazier, Andrew D. McFadden, Salvador G. Vela, III, Billy-Bob K. Walker, Adam J. Johnson
  • Publication number: 20240363991
    Abstract: A large balloon reflector, capable of launching and support itself at high altitudes, with a feed system capable of steering the beam quickly enough to perform target tracking of fast-moving terrestrial, stratospheric, or orbiting objects. The large balloon reflector antenna forms a suborbital antenna system that is suitable for operation from radio to infrared wavelengths and can be used, for example, for remote sensing of objects on the ground, in the atmosphere, or in space.
    Type: Application
    Filed: April 29, 2024
    Publication date: October 31, 2024
    Inventor: Christopher K. Walker
  • Publication number: 20240280007
    Abstract: An electric submersible pump (ESP) system is described herein. The ESP system includes a pump and a motor connected to drive the pump. The pump and motor are disposed to pump fluid into production tubing in a wellbore. A connector is in fluid communication with the production tubing and the connector contains a receptacle to receive a plug. A fixed power cable section is connected at a first end to power the motor. The fixed power cable section is fixedly connected at a second end to the receptacle of the connector. Also included in the ESP system is an ESP power cable that extends through the production tubing to an ESP surface unit. The ESP power cable includes a removable plug to engage the receptacle of the connector.
    Type: Application
    Filed: January 26, 2024
    Publication date: August 22, 2024
    Inventors: Michael C. TSCHAUNER, Billy-Bob K. WALKER, Michael C. ROMER
  • Publication number: 20240261555
    Abstract: A medical connector for use in a fluid pathway includes a housing configured to permit fluid flow between a first medical device and a second device or location. The medical connector includes a valve member configured to be positioned at least partially within the housing. The valve member is configured to receive the first medical device. The valve member can be moved into a second state. The connector can be adapted for use with a catheter assembly.
    Type: Application
    Filed: January 12, 2024
    Publication date: August 8, 2024
    Inventors: David Nelson, Joseph K. Walker
  • Publication number: 20240200442
    Abstract: A plunger lift system, as well as a method for monitoring plunger parameters within a wellbore using such a plunger lift system, are provided. The plunger lift system includes a lubricator attached to a wellhead at the surface and a plunger dimensioned to travel through the production tubing upon being released from the lubricator. The plunger lift system also includes magnetic sensor systems installed along the production tubing, where each magnetic sensor system includes a magnetic sensor for detecting the passage of the plunger as it travels through the production tubing, as well a communication device for transmitting communication signals between the magnetic sensor systems and a computing system located at the surface, where the computing system includes a processor and a non-transitory, computer-readable storage medium including computer-executable instructions that direct the processor to dynamically determine the plunger position and/or velocity based on the received communication signals.
    Type: Application
    Filed: March 4, 2024
    Publication date: June 20, 2024
    Inventors: Michael C. ROMER, Michael C. TSCHAUNER, Christopher C. FRAZIER, Andrew D. MCFADDEN, Salvador G. VELA, III, Billy-Bob K. WALKER, Adam J. JOHNSON
  • Publication number: 20240116857
    Abstract: In one aspect, the present disclosure provides compounds such as those with one or more quaternary ammonium ions joined by one or more aromatic rings. These compounds may have a formula: These compounds may be used in the treatment of a microbial infection such as a bacterial infection including infections of drug resistant strains of bacteria.
    Type: Application
    Filed: July 6, 2023
    Publication date: April 11, 2024
    Applicants: Saint Louis University, The Board of Regents of the University of Oklahoma
    Inventors: John K. WALKER, Valentin V. RYBENKOV, Ramakumar KINTHADA, Hang ZHAO, Elena I. ZGURSKAYA, Terri BOEHM, Zoya PETRUSHENKO
  • Patent number: 11952887
    Abstract: A plunger lift system, as well as a method for monitoring plunger parameters within a wellbore using such a plunger lift system, are provided. The plunger lift system includes a lubricator attached to a wellhead at the surface and a plunger dimensioned to travel through the production tubing upon being released from the lubricator. The plunger lift system also includes magnetic sensor systems installed along the production tubing, where each magnetic sensor system includes a magnetic sensor for detecting the passage of the plunger as it travels through the production tubing, as well a communication device for transmitting communication signals between the magnetic sensor systems and a computing system located at the surface, where the computing system includes a processor and a non-transitory, computer-readable storage medium including computer-executable instructions that direct the processor to dynamically determine the plunger position and/or velocity based on the received communication signals.
    Type: Grant
    Filed: April 12, 2022
    Date of Patent: April 9, 2024
    Assignee: ExxonMobil Technology and Engineering Company
    Inventors: Michael C. Romer, Michael C. Tschauner, Christopher C. Frazier, Andrew D. McFadden, Salvador G. Vela, III, Billy-Bob K. Walker, Adam J. Johnson
  • Patent number: 11872365
    Abstract: A medical connector for use in a fluid pathway includes a housing configured to permit fluid flow between a first medical device and a second device or location. The medical connector includes a valve member configured to be positioned at least partially within the housing. The valve member is configured to receive the first medical device. The valve member can be moved into a second state. The connector can be adapted for use with a catheter assembly.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: January 16, 2024
    Assignee: ICU Medical, Inc.
    Inventors: David Nelson, Joseph K. Walker
  • Publication number: 20240002380
    Abstract: Disclosed are compounds that regulate REV-ERB nuclear receptors that would be useful for treatment of various diseases. These compounds may be used in therapeutic applications such as in the treatment of neurodegenerative disease such as anxiety disorder, autoimmune diseases or disorders, or muscular disorders such as sarcopenia.
    Type: Application
    Filed: April 13, 2023
    Publication date: January 4, 2024
    Applicants: Saint Louis University, Pelagos Pharmaceuticals, Inc.
    Inventors: John K. Walker, Thomas Patrick Burris, Sadichha Sitaula, Arindam Chatterjee, Napoleon Clement D'Cunha, Eric Jon Jacobsen, James Robert Blinn
  • Publication number: 20230372658
    Abstract: Lightweight, portable oxygen concentrators that operate rising an ultra rapid, sub one second, adsorption cycle based on advanced molecular sieve materials are disclosed. The amount of sieve material utilized is a fraction of that used in conventional portable devices. This dramatically reduces the volume, weight, and cost of the device. Innovations in valve configuration, moisture control, case and battery design, and replaceable sieve module are described. Patients with breathing disorders and others requiring medical oxygen are provided with a long lasting, low cost alternative to existing portable oxygen supply devices.
    Type: Application
    Filed: May 19, 2022
    Publication date: November 23, 2023
    Inventors: Stephen Douglas GALBRAITH, Kenneth J. MCGOWAN, Evonne A. BALDAUFF, Elise N. DEPETRIS, David K. WALKER
  • Patent number: 11795162
    Abstract: In one aspect, the present disclosure describes new estrogen receptor-related orphan receptor (EER) inverse agonist compounds. Also described are pharmaceutical formulations, methods of synthesis and uses thereof.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: October 24, 2023
    Assignee: Saint Louis University
    Inventors: Thomas Burris, John K. Walker, Carissa S. Hampton, Keith McCormick Haynes, Kristine Griffett, Cyrielle Billon, Sadichha Sitaula
  • Patent number: 11746097
    Abstract: In some aspects, the present disclosure provides compounds of the formula: (I) or (II) wherein the variables are as defined herein. In some embodiments, these compounds may be used to treat cancer or other hyperproliferative diseases, as well as atherosclerosis and coronary artery disease.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: September 5, 2023
    Assignee: Saint Louis University
    Inventors: Thomas Burris, John K. Walker, Colin Flaveny, Arindam Chatterjee
  • Patent number: 11630299
    Abstract: Various examples are provided related to amplified deformable mirrors (ADMs). In one embodiment, an ADM includes a deformable mirror and a flexible dielectric matrix deposited on a front side of the deformable mirror. A pathlength of a wavelength, ?0, of electromagnetic radiation passing through the dielectric matrix can be amplified by a distribution of dielectric particles embedded in the dielectric matrix.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: April 18, 2023
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventor: Christopher K. Walker
  • Publication number: 20230088092
    Abstract: A photoactive cluster particle for durable latex paint compositions and said durable paint compositions, the photoactive cluster particle including a binder that coalesces cluster components into a cluster particle. The cluster components of the cluster particle include a photoactive component, one or more silicon-containing particles (may act as the binder), optional discrete polymeric particles each defining a closed void volume therein, optional non-photocatalytic inorganic pigment particles, optional organic latex polymer, and optional extender pigment particles. The photoactive cluster particle further includes an interstitial void network of the cluster particle forming a porosity thereof.
    Type: Application
    Filed: March 5, 2021
    Publication date: March 23, 2023
    Inventors: Robert A. MARTUCH, Stephanie L. CASTRO, Joseph K. WALKER, Jr.
  • Publication number: 20230019787
    Abstract: A plunger lift system, as well as a method for monitoring plunger parameters within a wellbore using such a plunger lift system, are provided. The plunger lift system includes a lubricator attached to a wellhead at the surface and a plunger dimensioned to travel through the production tubing upon being released from the lubricator. The plunger lift system also includes magnetic sensor systems installed along the production tubing, where each magnetic sensor system includes a magnetic sensor for detecting the passage of the plunger as it travels through the production tubing, as well a communication device for transmitting communication signals between the magnetic sensor systems and a computing system located at the surface, where the computing system includes a processor and a non-transitory, computer-readable storage medium including computer-executable instructions that direct the processor to dynamically determine the plunger position and/or velocity based on the received communication signals.
    Type: Application
    Filed: April 12, 2022
    Publication date: January 19, 2023
    Inventors: Michael C. Romer, Michael C. Tschauner, Christopher C. Frazier, Andrew D. McFadden, Salvador G. Vela, Billy-Bob K. Walker, Adam J. Johnson
  • Publication number: 20220267312
    Abstract: Provided herein are compounds of the formula: wherein the variables are as defined herein. Pharmaceutical compositions of the compounds are also provided. In some aspects, these compounds may be used for the treatment of diseases or disorders, such as an infection of an antibiotic resistant bacteria.
    Type: Application
    Filed: January 19, 2022
    Publication date: August 25, 2022
    Applicants: Saint Louis University, United States Government as Represented by the Department of Veterans Affairs
    Inventors: John K. WALKER, Feng CAO, Terri BOEHM, Kinthada RAMAKUMAR
  • Patent number: 11369768
    Abstract: Lightweight, portable oxygen concentrators that operate using an ultra rapid, sub one second, adsorption cycle based on advanced molecular sieve materials are disclosed. The amount of sieve material utilized is a fraction of that used in conventional portable devices. This dramatically reduces the volume, weight, and cost of the device. Innovations in valve configuration, moisture control, case and battery design, and replaceable sieve module are described. Patients with breathing disorders and others requiring medical oxygen are provided with a long lasting, low cost alternative to existing portable oxygen supply devices.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: June 28, 2022
    Assignee: SEPARATION DESIGN GROUP IP HOLDINGS, LLC
    Inventors: Stephen Douglas Galbraith, Kenneth J. McGowan, Evonne A. Baldauff, Elise N. Depetris, David K. Walker
  • Patent number: 11278697
    Abstract: Lightweight, portable oxygen concentrators that operate using an ultra rapid, sub one second, adsorption cycle based on advanced molecular sieve materials are disclosed. The amount of sieve material utilized is a fraction of that used in conventional portable devices. This dramatically reduces the volume, weight, and cost of the device. Innovations in valve configuration, moisture control, case and battery design, and replaceable sieve module are described. Patients with breathing disorders and others requiring medical oxygen are provided with a long lasting, low cost alternative to existing portable oxygen supply devices.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: March 22, 2022
    Assignee: SEPARATION DESIGN GROUP IP HOLDINGS, LLC
    Inventors: Stephen Douglas Galbraith, Kenneth J. McGowan, Evonne A. Baldauff, Elise N. Depetris, David K. Walker
  • Patent number: 11249918
    Abstract: A memory access system may include a first memory address translator, a second memory address translator and a mapping entry invalidator. The first memory address translator translates a first virtual address in a first protocol of a memory access request to a second virtual address in a second protocol and tracks memory access request completions. The second memory address translator is to translate the second virtual address to a physical address of a memory. The mapping entry invalidator requests invalidation of a first mapping entry of the first mapping address translator requests invalidation of a second mapping entry of the second memory address translator corresponding to the first mapping entry following invalidation of the first mapping entry and based upon the tracked memory access request completions.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: February 15, 2022
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Shawn K. Walker, Christopher Shawn Kroeger, Derek A. Sherlock