Patents by Inventor David K. Walker

David 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: 11932601
    Abstract: Compounds that modulate the oxidoreductase enzyme indoleamine 2,3-dioxygenase, and compositions containing the compounds, are described herein. The use of such compounds and compositions for the treatment and/or prevention of a diverse array of diseases, disorders and conditions, including cancer- and immune-related disorders, that are mediated by indoleamine 2,3-dioxygenase is also provided.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: March 19, 2024
    Assignee: Flexus Biosciences, Inc.
    Inventors: Hilary Plake Beck, Juan Carlos Jaen, Maksim Osipov, Jay Patrick Powers, Maureen Kay Reilly, Hunter Paul Shunatona, James Ross Walker, Mikhail Zibinsky, James Aaron Balog, David K. Williams, Weiwei Guo
  • 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: 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
  • Publication number: 20200139069
    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: Application
    Filed: November 8, 2019
    Publication date: May 7, 2020
    Inventors: Stephen Douglas Galbraith, Kenneth J. McGowan, Evonne A. Baldauff, Elise N. Depetris, David K. Walker
  • Publication number: 20200069903
    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: Application
    Filed: November 8, 2019
    Publication date: March 5, 2020
    Inventors: Stephen Douglas GALBRAITH, Kenneth J. MCGOWAN, Evonne A. BALDAUFF, Elise N. DEPETRIS, David K. WALKER
  • Patent number: 9993765
    Abstract: Lightweight, small, portable devices and methods are disclosed that provide oxygen-enriched air using an ultra rapid adsorption cycle based on advanced molecular sieve materials.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: June 12, 2018
    Assignee: SEPARATION DESIGN GROUP LLC
    Inventors: Stephen Douglas Galbraith, David K. Walker, Kenneth J. McGowan, Elise N. DePetris, Judith C. Galbraith
  • Publication number: 20170021302
    Abstract: Lightweight, small, portable devices and methods are disclosed that provide oxygen-enriched air using an ultra rapid adsorption cycle based on advanced molecular sieve materials.
    Type: Application
    Filed: August 26, 2016
    Publication date: January 26, 2017
    Inventors: STEPHEN DOUGLAS GALBRAITH, DAVID K. WALKER, KENNETH J. McGOWAN, ELISE N. DePETRIS, JUDITH C. GALBRAITH
  • Patent number: 9492781
    Abstract: Lightweight, small, portable devices and methods are disclosed that provide oxygen-enriched air using an ultra rapid adsorption cycle based on advanced molecular sieve materials.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: November 15, 2016
    Assignee: Separation Design Group LLC
    Inventors: Stephen Douglas Galbraith, David K. Walker, Kenneth J. McGowan, Elise N. DePetris, Judith C. Galbraith
  • Patent number: 9199055
    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: October 21, 2014
    Date of Patent: December 1, 2015
    Assignee: Separation Design Group LLC
    Inventors: Stephen Douglas Galbraith, Elise DePetris, David K. Walker
  • Publication number: 20150238721
    Abstract: An electronic E-cylinder is provided which is small in size and allows for connection to a ventilator cart having a standard yolk structure which is known in the medical industry for connection of standard E-cylinders. The machine may have oxygen output of up to 10 liters per minute at greater than 40 psig and desirably about 50 to 60 psig. Additionally, the electronic E-cylinder provides a plug and play removable filtering module to remove nitrogen from a compressed air flow and store concentrated oxygen while exhausting the filtered nitrogen to atmosphere.
    Type: Application
    Filed: February 24, 2014
    Publication date: August 27, 2015
    Applicant: Vetland Medical Sales and Services, LLC
    Inventors: Bradley D. Rumph, Stephen D. Galbraith, David K. Walker, Elise N. DePetris
  • Publication number: 20150104524
    Abstract: Lightweight, small, portable devices and methods are disclosed that provide oxygen-enriched air using an ultra rapid adsorption cycle based on advanced molecular sieve materials.
    Type: Application
    Filed: October 17, 2014
    Publication date: April 16, 2015
    Inventors: Stephen Douglas Galbraith, David K. Walker, Kenneth J. McGowan, Elise N. DePetris, Judith C. Galbraith
  • Publication number: 20150101603
    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: Application
    Filed: October 21, 2014
    Publication date: April 16, 2015
    Inventors: Stephen Douglas Galbraith, Elise DePetris, David K. Walker
  • Patent number: 8894751
    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: October 5, 2010
    Date of Patent: November 25, 2014
    Assignee: Separation Design Group LLC
    Inventors: Stephen Douglas Galbraith, Kenneth J. McGowan, Evonne A. Baldauff, Elise Galbraith, David K. Walker, Robert B. LaCount
  • Patent number: 8888902
    Abstract: Lightweight, small, portable devices and methods are disclosed that provide oxygen-enriched air using an ultra rapid adsorption cycle based on advanced molecular sieve materials.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: November 18, 2014
    Assignee: Separation Design Group LLC
    Inventors: Stephen Douglas Galbraith, David K. Walker, Kenneth J. McGowan, Elise N. DePetris, Judith C. Galbraith
  • Publication number: 20130216627
    Abstract: Lightweight, small, portable devices and methods are disclosed that provide oxygen-enriched air using an ultra rapid adsorption cycle based on advanced molecular sieve materials.
    Type: Application
    Filed: August 15, 2012
    Publication date: August 22, 2013
    Inventors: Stephen Douglas Galbraith, David K. Walker, Kenneth J. McGowan, Elise N. DePetris, Judith C. Galbraith
  • Publication number: 20120192864
    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: Application
    Filed: October 5, 2010
    Publication date: August 2, 2012
    Applicant: SEPARATION DESIGN GROUP LLC
    Inventors: Stephen Douglas Galbraith, Kenneth J. McGowan, Evonne A. Baldauff, Elise Galbraith, David K. Walker, Robert B. LaCount
  • Patent number: 5227800
    Abstract: A contraband detection system especially suited for detecting concealed non-metallic contraband such as ceramic or plastic weapons or illegal drugs carried by a person is disclosed. Plural sources of quasi-coherent millimeter wave radiation are disposed so as to uniformly illuminate a field of view. In the preferred embodiment, the radiation emitted by the sources is linearly polarized in a single plane such that the polarization of the radiation with respect to the plane in which linearly polarized radiation is preferentially received by the detectors can be controlled. For detection of dielectric objects, such as ceramic weapons or narcotics, these planes of polarization should be orthogonal to one another. The detector is a staring array which does not require scanning to generate an image of the entire field of view; the signal provided by each element of the detector array corresponds to the illumination reflected from objects in a single portion of the field of view.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: July 13, 1993
    Assignee: Millitech Corporation
    Inventors: G. Richard Huguenin, Paul F. Goldsmith, Naresh C. Deo, David K. Walker
  • Patent number: 5202692
    Abstract: A millimeter wave imaging system is disclosed which has wide applicability throughout transportation and related industries. For example, the system may be used to provide an aircraft pilot with an image of a landing field which is essentially unaffected by fog, rain, snow, blowing sand, etc. The system comprises an array of imaging elements as its fundamental component. Each of the imaging elements of the basic array comprises an antenna consisting of a pair of conductive elements and a non-linear circuit element connected thereacross. A image can then be formed responsive to millimeter-wave radiation without complex processing steps or any form of mechanical or electronic scanning.To increase the sensitivity of the imaging array system, a local oscillator signal may be mixed with the energy received from the field of view in each of the imaging elements by the non-linear circuit element. The oscillator used to provide the local oscillator signal can also be used to illuminate the field of view.
    Type: Grant
    Filed: April 17, 1991
    Date of Patent: April 13, 1993
    Assignee: Millitech Corporation
    Inventors: Richard G. Huguenin, Paul F. Goldsmith, Naresh C. Deo, David K. Walker
  • Patent number: 5145809
    Abstract: An improved method for manufacturing a semiconductor device is described. In the preferred embodiment, a Gunn diode is manufactured from InP active and buffer layers. The buffer layer is deposited on a GaAs substrate using an epitaxial deposition process and the active layer is deposited onto the buffer layer. Electrical connection to the InP layers is made by etching a via through the GaAs substrate and metallizing the walls of the via. After the device has been placed in its final package, the GaAs substrate material is removed. As a result, good thermal and electrical contact is made to the InP active layer, and therefore, a Gunn diode manufactured according to this invention can reliably produced greater output power.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: September 8, 1992
    Assignee: Millitech Corporation
    Inventor: David K. Walker