Patents by Inventor Sandra J. Gardner

Sandra J. Gardner 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: 20180210358
    Abstract: Cold pressure fix toner compositions include at least one crystalline polyester having a melting point in a range from about 30° C. to about 130° C., a rosin acid-based polyester resin and an amorphous polyester having a Tg higher than the rosin acid-based polyester. The crystalline polyester can have a melting point in a range from about 30° C. to about 130° C., the rosin acid-based polyester resin can have a Tg in a range from about 0° C. to about ?45° C. and an amorphous polyester having a Tg in a range from about 40° C. to about 70° C. The temperature difference between the rosin acid-based polyester resin and the amorphous polyester resin can be in a range from about 30° C. to about 110° C.
    Type: Application
    Filed: January 24, 2017
    Publication date: July 26, 2018
    Inventors: Guerino G. Sacripante, Yulin Wang, Nan-Xing Hu, Sandra J. Gardner, Richard Philip Nelson Veregin
  • Patent number: 10018931
    Abstract: Disclosed herein include toner compositions with toner particles having a core-shell type structure, where the core comprises a first resin comprising a styrene-acrylate copolymer and an amorphous polyester resin, and the shell comprises a second resin comprising beta-carboxyethyl acrylate (b-CEA) in an amount of from about 0.05 pph to about 2.5 pph by weight of the second resin.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: July 10, 2018
    Assignee: XEROX CORPORATION
    Inventors: Richard P N Veregin, Valerie M. Farrugia, Sandra J. Gardner
  • Patent number: 10007200
    Abstract: Core-shell toner particles with antimicrobial properties are described, the toner particles contain a metal ion nanoparticle in the shell.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: June 26, 2018
    Assignee: Xerox Corporation
    Inventors: Valerie M Farrugia, Alana R Desouza, Sandra J Gardner, Kimberly D Nosella
  • Patent number: 10007205
    Abstract: Disclosed herein include processes of preparing hybrid toner compositions with toner particles having a core-shell type structure, where the shell contains a non-volatile coalescent agent. More particularly, embodiments relate to processes of preparing styrene acrylate hybrid toner compositions.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: June 26, 2018
    Assignee: XEROX CORPORATION
    Inventors: Richard P N Veregin, Valerie M. Farrugia, Nan-Xing Hu, Sandra J. Gardner
  • Patent number: 9947430
    Abstract: A transparent conductive film. The film comprises a transparent polymer comprising fused latex polymer particles. A plurality of nanowires comprising silver are partially dispersed in the transparent polymer. Devices employing the transparent conductive film and methods of making the devices are also disclosed.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: April 17, 2018
    Assignee: XEROX CORPORATION
    Inventors: Yiliang Wu, Sandra J. Gardner
  • Patent number: 9891544
    Abstract: Disclosed herein include toner compositions with toner particles having a core-shell type structure, where the core comprises a first resin comprising a styrene-acrylate copolymer and an amorphous polyester resin, and the shell comprises a second resin comprising beta-carboxyethyl acrylate (b-CEA) in an amount of from about 0.05 pph to about 2.5 pph by weight of the second resin.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: February 13, 2018
    Assignee: XEROX CORPORATION
    Inventors: Richard P N Veregin, Valerie M. Farrugia, Sandra J. Gardner
  • Patent number: 9864291
    Abstract: A hybrid toner includes a core having at least one amorphous polyester resin and at least one crystalline polyester resin, and at least one styrene/acrylate resin, a shell comprising at least one styrene/acrylate resin, at least one wax, and optionally a pigment dispersion, the first modulated differential calorimetry scan of the hybrid toner shows at least two melting point peaks below about 80° C., and the difference between the two melting point peaks is less than or equal to about 15° C.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: January 9, 2018
    Assignee: XEROX CORPORATION
    Inventors: Richard P. N. Veregin, Valerie M. Farrugia, Frank Ping-Hay Lee, Michael J. D'Amato, Michael S. Hawkins, Edward G. Zwartz, Yulin Wang, Abdisamed Sheik-Qasim, Sandra J. Gardner
  • Publication number: 20170363984
    Abstract: A hybrid toner includes a core having at least one amorphous polyester resin and at least one crystalline polyester resin, and at least one styrene/acrylate resin, a shell comprising at least one styrene/acrylate resin, at least one wax, and optionally a pigment dispersion, the first modulated differential calorimetry scan of the hybrid toner shows at least two melting point peaks below about 80° C., and the difference between the two melting point peaks is less than or equal to about 15° C.
    Type: Application
    Filed: June 20, 2016
    Publication date: December 21, 2017
    Inventors: Richard P. N. Veregin, Valerie M. Farrugia, Frank Ping-Hay Lee, Michael J. D'Amato, Michael S. Hawkins, Edward G. Zwartz, Yulin Wang, Abdisamed Sheik-Qasim, Sandra J. Gardner
  • Patent number: 9777124
    Abstract: A method includes heating a sulfonated polyester resin in an organic-free solvent, adding a solution of silver (I) ion to the heated resin in water to form a mixture, reducing silver (I) to silver(0) by heating the mixture from about 65° C. to about 90° C., thereby forming an emulsion of composite particles comprising a sulfonated polyester matrix and a plurality of silver nanoparticles disposed within the sulfonated polyester matrix, and allowing the silver nanoparticles to agglomerate into a silver nanodendrite structure.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: October 3, 2017
    Assignee: XEROX CORPORATION
    Inventors: Valerie M. Farrugia, Alana Desouza, Sandra J. Gardner
  • Publication number: 20170233535
    Abstract: A nanocomposite includes a core comprising a first polymer, a shell disposed about the core, the shell comprising a sulfonated polyester, the first polymer and sulfonated polyester are different, and a plurality of silver nanoparticles disposed throughout the shell layer.
    Type: Application
    Filed: May 4, 2017
    Publication date: August 17, 2017
    Inventors: Valerie M. Farrugia, ALANA DESOUZA, SANDRA J. GARDNER
  • Patent number: 9727012
    Abstract: A member for a fuser assembly of a printer. The member may include a support body and a composite coating disposed on an outer surface of the support body. The composite coating may include a fluororesin and a nanocarbon material dispersed within the fluororesin. The nanocarbon material may be present in a higher concentration proximate the support body and a lower concentration proximate an outer surface of the composite coating. The lower concentration may be less than or equal to about 2 wt % of the nanocarbon material.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: August 8, 2017
    Assignee: XEROX CORPORATION
    Inventors: Suxia Yang, Nan-Xing Hu, Qi Zhang, Sandra J. Gardner, Edward G. Zwartz, Guiqin Song
  • Patent number: 9718970
    Abstract: A nanocomposite includes a core comprising a first polymer, a shell disposed about the core, the shell comprising a sulfonated polyester, the first polymer and sulfonated polyester are different, and a plurality of silver nanoparticles disposed throughout the shell layer.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: August 1, 2017
    Assignee: XEROX CORPORATION
    Inventors: Valerie M. Farrugia, Alana Desouza, Sandra J. Gardner
  • Patent number: 9680112
    Abstract: An electronic device, such as a thin-film transistor, includes a semiconducting layer formed from a semiconductor composition. The semiconductor composition comprises a polymer binder and a small molecule semiconductor. The small molecule semiconductor in the semiconducting layer has a crystallite size of less than 100 nanometers. Devices formed from the composition exhibit high mobility and excellent stability.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: June 13, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yiliang Wu, Sandra J. Gardner, Anthony James Wigglesworth, Ping Liu, Nan-Xing Hu
  • Publication number: 20170123336
    Abstract: Disclosed herein include toner compositions with toner particles having a core-shell type structure, where the core comprises a first resin comprising a styrene-acrylate copolymer and an amorphous polyester resin, and the shell comprises a second resin comprising beta-carboxyethyl acrylate (b-CEA) in an amount of from about 0.05 pph to about 2.5 pph by weight of the second resin.
    Type: Application
    Filed: January 17, 2017
    Publication date: May 4, 2017
    Inventors: Richard PN Veregin, Valerie M. Farrugia, SANDRA J. GARDNER
  • Publication number: 20170121488
    Abstract: A composite includes a sulfonated polyester matrix and a plurality of silver nanoparticles dispersed within the matrix. Methods to make these composites include heating a sulfonated polyester resin in an organic-free solvent adding a solution of silver (I) ion to the heated resin in water to form a mixture, adding a solution of a reducing agent to the mixture, thereby forming an emulsion of composite particles including a sulfonated polyester matrix and a plurality of silver nanoparticles disposed within the sulfonated polyester matrix. Various articles can be manufactured from such composites.
    Type: Application
    Filed: January 17, 2017
    Publication date: May 4, 2017
    Inventors: VALERIE M. FARRUGIA, ALANA DESOUZA, SANDRA J. GARDNER
  • Publication number: 20170066942
    Abstract: The disclosure provides pigment dispersions having an average particle size of from about 10 nm to about 500 nm prepared by employing a magnetic actuated milling process and system. In embodiments, the pigment dispersions have an average particle size of less than 100 nm.
    Type: Application
    Filed: November 14, 2016
    Publication date: March 9, 2017
    Inventors: KE ZHOU, FRANK PING HAY LEE, HARRY LATCHMAN, YULIN WANG, SANDRA J. GARDNER
  • Patent number: 9579658
    Abstract: A method and system for magnetic actuated mixing which use magnetic particles, non-magnetic abrasive particles and electromagnetic field to facilitate milling. The method and system use magnetic particles and a generated electromagnetic field to facilitate the milling as well. The method and system can be used in any application that requires the preparation of small-sized particles at either the micro or nano scale, including for example, preparing toners, inks, wax, pigment dispersions and the like.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: February 28, 2017
    Assignee: XEROX CORPORATION
    Inventors: Ke Zhou, Shiying Lu, Jun Zhao, Sandra J. Gardner, Yulin Wang, John Abate
  • 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
  • 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
  • Publication number: 20170037197
    Abstract: A method includes heating a sulfonated polyester resin in an organic-free solvent, adding a solution of silver (I) ion to the heated resin in water to form a mixture, reducing silver (I) to silver(0) by heating the mixture from about 65° C. to about 90° C., thereby forming an emulsion of composite particles comprising a sulfonated polyester matrix and a plurality of silver nanoparticles disposed within the sulfonated polyester matrix, and allowing the silver nanoparticles to agglomerate into a silver nanodendrite structure.
    Type: Application
    Filed: October 18, 2016
    Publication date: February 9, 2017
    Inventors: Valerie M. Farrugia, Alana Desouza, Sandra J. Gardner