Patents by Inventor Joshua A. Ritchey

Joshua A. Ritchey 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: 20240076726
    Abstract: Emulsion compositions are provided herein. Also provided herein are kits containing one or more emulsion compositions or components for making such emulsion compositions. Also provided herein are methods of using such emulsion compositions, such as for amplification of target nucleic acids in emulsion droplets.
    Type: Application
    Filed: November 3, 2023
    Publication date: March 7, 2024
    Inventors: Yi XUE, Joshua RITCHEY, Robert MELTZER
  • Publication number: 20240024870
    Abstract: Compositions, devices, and methods are disclosed for the modification of polymer surfaces with coatings having a dispersion of silicone polymer and hydrophobic silica. The surface coatings provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.
    Type: Application
    Filed: August 2, 2023
    Publication date: January 25, 2024
    Inventors: Joshua RITCHEY, Yi XUE, Robert MELTZER
  • Patent number: 11845980
    Abstract: Emulsion compositions are provided herein. Also provided herein are kits containing one or more emulsion compositions or components for making such emulsion compositions. Also provided herein are methods of using such emulsion compositions, such as for amplification of target nucleic acids in emulsion droplets.
    Type: Grant
    Filed: February 4, 2022
    Date of Patent: December 19, 2023
    Assignee: Bio-Rad Laboratories, Inc.
    Inventors: Yi Xue, Joshua Ritchey, Robert Meltzer
  • Patent number: 11759780
    Abstract: Compositions, devices, and methods are disclosed for the modification of polymer surfaces with coatings having a dispersion of silicone polymer and hydrophobic silica. The surface coatings provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.
    Type: Grant
    Filed: January 20, 2021
    Date of Patent: September 19, 2023
    Assignee: Bio-Rad Laboratories, Inc.
    Inventors: Joshua Ritchey, Yi Xue, Robert Meltzer
  • Publication number: 20220154266
    Abstract: Emulsion compositions are provided herein. Also provided herein are kits containing one or more emulsion compositions or components for making such emulsion compositions. Also provided herein are methods of using such emulsion compositions, such as for amplification of target nucleic acids in emulsion droplets.
    Type: Application
    Filed: February 4, 2022
    Publication date: May 19, 2022
    Inventors: Yi XUE, Joshua RITCHEY, Robert MELTZER
  • Publication number: 20220128446
    Abstract: Provided is a nanosensor having a high dynamic range and sensitivity for detecting the presence, and/or quantifying the amount, of an analyte in a sample of interest. Also provided is a cartridge incorporating the nanosensor, and a method and system for detecting the presence, and/or quantifying the amount, of the analyte in the sample of interest.
    Type: Application
    Filed: February 27, 2020
    Publication date: April 28, 2022
    Inventors: Qimin Quan, Joseph Wilkinson, Joshua A. Ritchey, John Boyce
  • Patent number: 11274337
    Abstract: Emulsion compositions are provided herein. Also provided herein are kits containing one or more emulsion compositions or components for making such emulsion compositions. Also provided herein are methods of using such emulsion compositions, such as for amplification of target nucleic acids in emulsion droplets.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: March 15, 2022
    Assignee: Bio-Rad Laboratories, Inc.
    Inventors: Yi Xue, Joshua Ritchey, Robert Meltzer
  • Patent number: 11118217
    Abstract: Emulsion compositions are provided herein. Also provided herein are kits containing one or more emulsion compositions or components for making such emulsion compositions. Also provided herein are methods of using such emulsion compositions, such as for amplification of target nucleic acids in emulsion droplets.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: September 14, 2021
    Assignee: Bio-Rad Laboratories, Inc.
    Inventors: Yi Xue, Joshua Ritchey, Robert Meltzer
  • Publication number: 20210162406
    Abstract: Compositions, devices, and methods are disclosed for the modification of polymer surfaces with coatings having a dispersion of silicone polymer and hydrophobic silica. The surface coatings provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.
    Type: Application
    Filed: January 20, 2021
    Publication date: June 3, 2021
    Inventors: Joshua RITCHEY, Yi XUE, Robert MELTZER
  • Patent number: 10919038
    Abstract: Compositions, devices, and methods are disclosed for the modification of polymer surfaces with coatings having a dispersion of silicone polymer and hydrophobic silica. The surface coatings provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: February 16, 2021
    Assignee: Bio-Rad Laboratories, Inc.
    Inventors: Joshua Ritchey, Yi Xue, Robert Meltzer
  • Publication number: 20200332354
    Abstract: Emulsion compositions are provided herein. Also provided herein are kits containing one or more emulsion compositions or components for making such emulsion compositions. Also provided herein are methods of using such emulsion compositions, such as for amplification of target nucleic acids in emulsion droplets.
    Type: Application
    Filed: July 6, 2020
    Publication date: October 22, 2020
    Inventors: Yi XUE, Joshua RITCHEY, Robert MELTZER
  • Patent number: 10796649
    Abstract: A variable transmission medium comprises a fluid and a plurality of nanoparticles dispersed in the fluid, wherein addition of acid to the fluid causes the nanoparticles to flocculate and form aggregates of particles that scatter light. The nanoparticles may comprise at least one metal oxide, such as titanium dioxide, zinc oxide or zirconium dioxide. The fluid may have a dielectric constant less than about 10. The medium may be used in, for example, privacy glass for a conference room.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: October 6, 2020
    Assignee: E Ink Corporation
    Inventors: Stephen J. Telfer, Richard J. Paolini, Jr., Stephen Bull, Joshua A. Ritchey, Kosta Ladavac, Lee Yezek, Craig A. Herb, Peter Carsten Bailey Widger
  • Patent number: 10538659
    Abstract: Compositions, devices, and methods are disclosed for the covalent modification of polymer surfaces with graft copolymers having a blend of side chains. The halogenated acrylic and polyalkylene glycol acrylic side chains of the graft copolymer provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: January 21, 2020
    Assignee: Bio-Rad Laboratories, Inc.
    Inventor: Joshua Ritchey
  • Patent number: 10233339
    Abstract: An electrophoretic medium including a mixture of charge control agents, for example quaternary amine salts of polyisobutylene combined with quaternary amine salts of unsaturated monomers. The described electrophoretic medium exhibits improved color saturation as compared to similar electrophoretic media having only one of the charge control agents.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: March 19, 2019
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Hui Du, Joshua A Ritchey, Olga Vladimirovna Barykina-Tassa, Vladimir Sofiyev
  • Publication number: 20180340084
    Abstract: An electrophoretic medium including a mixture of charge control agents, for example quaternary amine salts of polyisobutylene combined with quaternary amine salts of unsaturated monomers. The described electrophoretic medium exhibits improved color saturation as compared to similar electrophoretic media having only one of the charge control agents.
    Type: Application
    Filed: August 6, 2018
    Publication date: November 29, 2018
    Inventors: Hui DU, Joshua A RITCHEY, Olga Vladimirovna BARYKINA-TASSA, Vladimir SOFIYEV
  • Publication number: 20180247599
    Abstract: A variable transmission medium comprises a fluid and a plurality of nanoparticles dispersed in the fluid, wherein addition of acid to the fluid causes the nanoparticles to flocculate and form aggregates of particles that scatter light. The nanoparticles may comprise at least one metal oxide, such as titanium dioxide, zinc oxide or zirconium dioxide. The fluid may have a dielectric constant less than about 10. The medium may be used in, for example, privacy glass for a conference room.
    Type: Application
    Filed: April 23, 2018
    Publication date: August 30, 2018
    Inventors: Stephen J. TELFER, Richard J. PAOLINI, Jr., Stephen BULL, Joshua A. RITCHEY, Kosta LADAVAC, Lee YEZEK, Craig A. HERB, Peter Carsten Bailey WIDGER
  • Patent number: 10040954
    Abstract: An electrophoretic medium including a mixture of charge control agents, for example quaternary amine salts of polyisobutylene combined with quaternary amine salts of polyesters. The described electrophoretic medium exhibits improved color saturation as compared to similar electrophoretic media having only one of the charge control agents.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: August 7, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Hui Du, Joshua A Ritchey, Olga Vladimirovna Barykina-Tassa, Vladimir Sofiyev
  • Publication number: 20180216171
    Abstract: Emulsion compositions are provided herein. Also provided herein are kits containing one or more emulsion compositions or components for making such emulsion compositions. Also provided herein are methods of using such emulsion compositions, such as for amplification of target nucleic acids in emulsion droplets.
    Type: Application
    Filed: January 29, 2018
    Publication date: August 2, 2018
    Inventors: Yi XUE, Joshua RITCHEY, Robert MELTZER
  • Publication number: 20180178213
    Abstract: Compositions, devices, and methods are disclosed for the modification of polymer surfaces with coatings having a dispersion of silicone polymer and hydrophobic silica. The surface coatings provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.
    Type: Application
    Filed: December 27, 2017
    Publication date: June 28, 2018
    Inventors: Joshua RITCHEY, Yi XUE, Robert MELTZER
  • Publication number: 20180171133
    Abstract: Compositions, devices, and methods are disclosed for the covalent modification of polymer surfaces with graft copolymers having a blend of side chains. The halogenated acrylic and polyalkylene glycol acrylic side chains of the graft copolymer provide the polymer surface with high hydrophobicity, as well as increased resistance to biofouling with proteinaceous material. The polymer surfaces can be particularly useful in microfluidic devices and methods that involve the contacting of the covalently modified polymer surfaces with emulsions of aqueous droplets containing biological macromolecules within an oil carrier phase.
    Type: Application
    Filed: December 19, 2017
    Publication date: June 21, 2018
    Inventor: Joshua RITCHEY