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).

  • Patent number: 12140520
    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: Grant
    Filed: February 27, 2020
    Date of Patent: November 12, 2024
    Assignee: NanoMosaic Inc.
    Inventors: Qimin Quan, Joseph Wilkinson, Joshua A. Ritchey, John Boyce
  • 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: 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: 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
  • 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
  • Patent number: 9953588
    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.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: April 24, 2018
    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: 8679621
    Abstract: An autonomic conductivity restoration system includes a solid conductor and a plurality of particles. The particles include a conductive fluid, a plurality of conductive microparticles, and/or a conductive material forming agent. The solid conductor has a first end, a second end, and a first conductivity between the first and second ends. When a crack forms between the first and second ends of the conductor, the contents of at least a portion of the particles are released into the crack. The cracked conductor and the released contents of the particles form a restored conductor having a second conductivity, which may be at least 90% of the first conductivity.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: March 25, 2014
    Assignee: Board of Trustees of the University of Illinois
    Inventors: Benjamin J. Blaiszik, Susan A. Odom, Mary M. Caruso, Aaron C. Jackson, Marta B. Baginska, Joshua A. Ritchey, Aaron D. Finke, Scott R. White, Jeffrey S. Moore, Nancy R. Sottos, Paul V. Braun, Khalil Amine
  • Publication number: 20120067615
    Abstract: An autonomic conductivity restoration system includes a solid conductor and a plurality of particles. The particles include a conductive fluid, a plurality of conductive microparticles, and/or a conductive material forming agent. The solid conductor has a first end, a second end, and a first conductivity between the first and second ends. When a crack forms between the first and second ends of the conductor, the contents of at least a portion of the particles are released into the crack. The cracked conductor and the released contents of the particles form a restored conductor having a second conductivity, which may be at least 90% of the first conductivity.
    Type: Application
    Filed: June 20, 2011
    Publication date: March 22, 2012
    Applicant: The Board of Trustees of the University of Illinois
    Inventors: Benjamin J. Blaiszik, Susan A. Odom, Mary M. Caruso, Aaron C. Jackson, Marta B. Baginska, Joshua A. Ritchey, Aaron D. Finke, Scott R. White, Jeffrey S. Moore, Nancy R. Sottos, Paul V. Braun, Khalil Amine