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).
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Patent number: 12290009Abstract: 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: GrantFiled: April 28, 2020Date of Patent: April 29, 2025Assignee: Arizona Board of Regents on Behalf of the University of ArizonaInventor: Christopher K. Walker
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Patent number: 12252983Abstract: 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: GrantFiled: March 4, 2024Date of Patent: March 18, 2025Assignee: ExxonMobil Technology and Engineering CompanyInventors: Michael C. Romer, Michael C. Tschauner, Christopher C. Frazier, Andrew D. McFadden, Salvador G. Vela, III, Billy-Bob K. Walker, Adam J. Johnson
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Publication number: 20240363991Abstract: 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: ApplicationFiled: April 29, 2024Publication date: October 31, 2024Inventor: Christopher K. Walker
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Publication number: 20240280007Abstract: 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: ApplicationFiled: January 26, 2024Publication date: August 22, 2024Inventors: Michael C. TSCHAUNER, Billy-Bob K. WALKER, Michael C. ROMER
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Publication number: 20240261555Abstract: 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: ApplicationFiled: January 12, 2024Publication date: August 8, 2024Inventors: David Nelson, Joseph K. Walker
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Publication number: 20240200442Abstract: 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: ApplicationFiled: March 4, 2024Publication date: June 20, 2024Inventors: Michael C. ROMER, Michael C. TSCHAUNER, Christopher C. FRAZIER, Andrew D. MCFADDEN, Salvador G. VELA, III, Billy-Bob K. WALKER, Adam J. JOHNSON
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Publication number: 20240116857Abstract: 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: ApplicationFiled: July 6, 2023Publication date: April 11, 2024Applicants: Saint Louis University, The Board of Regents of the University of OklahomaInventors: John K. WALKER, Valentin V. RYBENKOV, Ramakumar KINTHADA, Hang ZHAO, Elena I. ZGURSKAYA, Terri BOEHM, Zoya PETRUSHENKO
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Patent number: 11952887Abstract: 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: GrantFiled: April 12, 2022Date of Patent: April 9, 2024Assignee: ExxonMobil Technology and Engineering CompanyInventors: Michael C. Romer, Michael C. Tschauner, Christopher C. Frazier, Andrew D. McFadden, Salvador G. Vela, III, Billy-Bob K. Walker, Adam J. Johnson
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Patent number: 11872365Abstract: 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: GrantFiled: August 31, 2020Date of Patent: January 16, 2024Assignee: ICU Medical, Inc.Inventors: David Nelson, Joseph K. Walker
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Publication number: 20240002380Abstract: 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: ApplicationFiled: April 13, 2023Publication date: January 4, 2024Applicants: 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
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Publication number: 20230372658Abstract: 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: ApplicationFiled: May 19, 2022Publication date: November 23, 2023Inventors: Stephen Douglas GALBRAITH, Kenneth J. MCGOWAN, Evonne A. BALDAUFF, Elise N. DEPETRIS, David K. WALKER
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Patent number: 11795162Abstract: 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: GrantFiled: August 17, 2018Date of Patent: October 24, 2023Assignee: Saint Louis UniversityInventors: Thomas Burris, John K. Walker, Carissa S. Hampton, Keith McCormick Haynes, Kristine Griffett, Cyrielle Billon, Sadichha Sitaula
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Patent number: 11746097Abstract: 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: GrantFiled: June 23, 2017Date of Patent: September 5, 2023Assignee: Saint Louis UniversityInventors: Thomas Burris, John K. Walker, Colin Flaveny, Arindam Chatterjee
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Patent number: 11630299Abstract: 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: GrantFiled: April 30, 2020Date of Patent: April 18, 2023Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONAInventor: Christopher K. Walker
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Publication number: 20230088092Abstract: 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: ApplicationFiled: March 5, 2021Publication date: March 23, 2023Inventors: Robert A. MARTUCH, Stephanie L. CASTRO, Joseph K. WALKER, Jr.
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Publication number: 20230019787Abstract: 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: ApplicationFiled: April 12, 2022Publication date: January 19, 2023Inventors: Michael C. Romer, Michael C. Tschauner, Christopher C. Frazier, Andrew D. McFadden, Salvador G. Vela, Billy-Bob K. Walker, Adam J. Johnson
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Publication number: 20220267312Abstract: 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: ApplicationFiled: January 19, 2022Publication date: August 25, 2022Applicants: Saint Louis University, United States Government as Represented by the Department of Veterans AffairsInventors: John K. WALKER, Feng CAO, Terri BOEHM, Kinthada RAMAKUMAR
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Patent number: 11369768Abstract: 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: GrantFiled: November 8, 2019Date of Patent: June 28, 2022Assignee: SEPARATION DESIGN GROUP IP HOLDINGS, LLCInventors: Stephen Douglas Galbraith, Kenneth J. McGowan, Evonne A. Baldauff, Elise N. Depetris, David K. Walker
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Patent number: 11278697Abstract: 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: GrantFiled: November 8, 2019Date of Patent: March 22, 2022Assignee: SEPARATION DESIGN GROUP IP HOLDINGS, LLCInventors: Stephen Douglas Galbraith, Kenneth J. McGowan, Evonne A. Baldauff, Elise N. Depetris, David K. Walker
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Patent number: 11249918Abstract: 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: GrantFiled: October 30, 2018Date of Patent: February 15, 2022Assignee: Hewlett Packard Enterprise Development LPInventors: Shawn K. Walker, Christopher Shawn Kroeger, Derek A. Sherlock