Patents by Inventor Wendy Chi

Wendy Chi 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).

  • Sulfonated polyester-metal nanoparticle composite toner for colorimetric sensing applications
    Patent number: 10684280
    Abstract: A toner composite material includes toner particles that include a sulfonated polyester and a wax and metal nanoparticles disposed on the surface of the toner particles. A method includes providing such toner composite materials, fusing the material to a substrate and covalently linking a ligand to the surface of the silver nanoparticles via a thiol, carboxylate, or amine functional group. Detection strips include a substrate and such toner composite materials fused on the substrate.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: June 16, 2020
    Assignee: XEROX CORPORATION
    Inventors: Valerie M. Farrugia, Wendy Chi, Sandra J. Gardner
  • Anti-bacterial aqueous ink compositions comprising metal ion composite ionomer resins
    Patent number: 10570290
    Abstract: An aqueous ink composition including water; an optional co-solvent; an optional colorant; and a composite nanoparticle comprising a core and a shell; wherein the core comprises a styrene/acrylate polymer core resin, optionally comprising a metal; and wherein the shell comprises a metal. An aqueous ink composition including water; an optional co-solvent; an optional colorant; and an ionic polymer-metal composite; wherein the ionic-polymer metal composite nanoparticle acts as a reservoir for the delivery of metal ions for anti-bacterial effect, antifungal effect, antiviral biocide effect, or a combination thereof.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: February 25, 2020
    Assignee: Xerox Corporation
    Inventors: Valerie M. Farrugia, Wendy Chi
  • Antimicrobial sulfonated polyester resin
    Patent number: 10216111
    Abstract: Toner particles contain a core-shell resin particle containing at least one (sulfo) polyester containing a metal on nanoparticle, and a shell containing a metal ion nanoparticle.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: February 26, 2019
    Assignee: Xerox Corporation
    Inventors: Valerie M Farrugia, Alana R Desouza, Sandra J Gardner, Wendy Chi
  • SULFONATED POLYESTER-METAL NANOPARTICLE COMPOSITE TONER FOR COLORIMETRIC SENSING APPLICATIONS
    Publication number: 20190018008
    Abstract: A toner composite material includes toner particles that include a sulfonated polyester and a wax and metal nanoparticles disposed on the surface of the toner particles. A method includes providing such toner composite materials, fusing the material to a substrate and covalently linking a ligand to the surface of the silver nanoparticles via a thiol, carboxylate, or amine functional group. Detection strips include a substrate and such toner composite materials fused on the substrate.
    Type: Application
    Filed: September 5, 2018
    Publication date: January 17, 2019
    Inventors: Valerie M. Farrugia, Wendy Chi, Sandra J. Gardner
  • Sulfonated polyester-metal nanoparticle composite toner for colorimetric sensing applications
    Patent number: 10132803
    Abstract: A toner composite material includes toner particles that include a sulfonated polyester and a wax and metal nanoparticles disposed on the surface of the toner particles. A method includes providing such toner composite materials, fusing the material to a substrate and covalently linking a ligand to the surface of the silver nanoparticles via a thiol, carboxylate, or amine functional group. Detection strips include a substrate and such toner composite materials fused on the substrate.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: November 20, 2018
    Assignee: XEROX CORPORATION
    Inventors: Valerie M. Farrugia, Wendy Chi, Sandra J. Gardner
  • Anti-Bacterial Aqueous Ink Compositions Comprising Metal Ion Composite Ionomer Resins
    Publication number: 20180037750
    Abstract: An aqueous ink composition including water; an optional co-solvent; an optional colorant; and a composite nanoparticle comprising a core and a shell; wherein the core comprises a styrene/acrylate polymer core resin, optionally comprising a metal; and wherein the shell comprises a metal. An aqueous ink composition including water; an optional co-solvent; an optional colorant; and an ionic polymer-metal composite; wherein the ionic-polymer metal composite nanoparticle acts as a reservoir for the delivery of metal ions for anti-bacterial effect, antifungal effect, antiviral biocide effect, or a combination thereof.
    Type: Application
    Filed: October 19, 2017
    Publication date: February 8, 2018
    Inventors: Valerie M. Farrugia, Wendy Chi
  • Anti-bacterial aqueous ink compositions comprising metal ion composite ionomer resins
    Patent number: 9840626
    Abstract: An aqueous ink composition including water; an optional co-solvent; an optional colorant; and a composite nanoparticle comprising a core and a shell; wherein the core comprises a styrene/acrylate polymer core resin, optionally comprising a metal; and wherein the shell comprises a metal. An aqueous ink composition including water; an optional co-solvent; an optional colorant; and an ionic polymer-metal composite; wherein the ionic-polymer metal composite nanoparticle acts as a reservoir for the delivery of metal ions for anti-bacterial effect, antifungal effect, antiviral biocide effect, or a combination thereof.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: December 12, 2017
    Assignee: Xerox Corporation
    Inventors: Valerie M. Farrugia, Wendy Chi
  • Metallo ionomer polymers
    Patent number: 9574036
    Abstract: Ionomer composite resins and core/shell nanoparticles are described. The ionomer resin contains a metal ion. The metal can be in the core, shell or both.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: February 21, 2017
    Assignee: Xerox Corporation
    Inventors: Valerie M Farrugia, Wendy Chi, Sandra J Gardner
  • SULFONATED POLYESTER-METAL NANOPARTICLE COMPOSITE TONER FOR COLORIMETRIC SENSING APPLICATIONS
    Publication number: 20170038376
    Abstract: A toner composite material includes toner particles that include a sulfonated polyester and a wax and metal nanoparticles disposed on the surface of the toner particles. A method includes providing such toner composite materials, fusing the material to a substrate and covalently linking a ligand to the surface of the silver nanoparticles via a thiol, carboxylate, or amine functional group. Detection strips include a substrate and such toner composite materials fused on the substrate.
    Type: Application
    Filed: August 7, 2015
    Publication date: February 9, 2017
    Inventors: Valerie M. Farrugia, WENDY CHI, SANDRA J. GARDNER
  • Anti-Bacterial Aqueous Ink Compositions Comprising Metal Ion Composite Ionomer Resins
    Publication number: 20170022370
    Abstract: An aqueous ink composition including water; an optional co-solvent; an optional colorant; and a composite nanoparticle comprising a core and a shell; wherein the core comprises a styrene/acrylate polymer core resin, optionally comprising a metal; and wherein the shell comprises a metal. An aqueous ink composition including water; an optional co-solvent; an optional colorant; and an ionic polymer-metal composite; wherein the ionic-polymer metal composite nanoparticle acts as a reservoir for the delivery of metal ions for anti-bacterial effect, antifungal effect, antiviral biocide effect, or a combination thereof.
    Type: Application
    Filed: July 23, 2015
    Publication date: January 26, 2017
    Inventors: Valerie M. Farrugia, Wendy Chi
  • Metallo Ionomer Polymers
    Publication number: 20160326284
    Abstract: Ionomer composite resins and core/shell nanoparticles are described. The ionomer resin contains a metal ion. The metal can be in the core, shell or both.
    Type: Application
    Filed: May 7, 2015
    Publication date: November 10, 2016
    Inventors: Valerie M. Farrugia, Wendy Chi, Sandra J. Gardner
  • Antimicrobial Sulfonated Polyester Resin
    Publication number: 20160326337
    Abstract: Toner particles contain a core-shell resin particle containing at least one (sulfo) polyester containing a metal on nanoparticle, and a shell containing a metal ion nanoparticle.
    Type: Application
    Filed: May 7, 2015
    Publication date: November 10, 2016
    Inventors: Valerie M. Farrugia, Alana R. Desouza, Sandra J. Gardner, Wendy Chi