Patents by Inventor Maria N. V McDougall

Maria N. V McDougall 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).

  • Toner compositions
    Patent number: 8828637
    Abstract: Toner particles are provided which may include a core and a shell, one or both of which may include a polyester gel. The gel in the shell and/or core may prevent a crystalline resin in the core from migrating to the toner surface.
    Type: Grant
    Filed: September 7, 2013
    Date of Patent: September 9, 2014
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Karen Ann Moffat, Maria N V McDougall, Edward G Zwartz, Paul J Gerroir
  • Toner Compositions
    Publication number: 20140011131
    Abstract: Toner particles are provided which may include a core and a shell, one or both of which may include a polyester gel. The gel in the shell and/or core may prevent a crystalline resin in the core from migrating to the toner surface.
    Type: Application
    Filed: September 7, 2013
    Publication date: January 9, 2014
    Applicant: Xerox Corporation
    Inventors: Ke Zhou, Karen Ann Moffat, Maria N.V. McDougall, Edward G. Zwartz, Paul J. Gerroir
  • Toner compositions
    Patent number: 8586272
    Abstract: The present disclosure provides toner compositions able to prevent the formation of mold or bacterial growth during storage. In embodiments, toners may include at least one biocide that prevents the formation of mold and/or bacteria in a toner composition, including any emulsion that may be utilized in forming the toner composition. In embodiments, the biocide may also improve charging characteristics of the toner.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: November 19, 2013
    Assignee: Xerox Corporation
    Inventors: Kimberly D. Nosella, Maria N. V. McDougall, Melanie Lynn Davis
  • Toner compositions
    Patent number: 8530131
    Abstract: Toner particles are provided which may, in embodiments, include a core and a shell, one or both of which may include a polyester gel. The gel in the shell and/or core may prevent a crystalline resin in the core from migrating to the toner surface.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: September 10, 2013
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Karen Ann Moffat, Maria N. V. McDougall, Edward G. Zwartz, Paul J. Gerroir
  • Toner compositions and processes
    Patent number: 8221948
    Abstract: Environmentally friendly toner particles are provided which may, in embodiments, include a bio-based amorphous polyester resin, optionally in combination with another amorphous resin and/or a crystalline resin. Toner particles may, in embodiments, have a core-shell configuration, with the shell formed of the bio-based amorphous polyester resin, the amorphous polyester resin, the crystalline polyester resin, or combinations thereof.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: July 17, 2012
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Richard P. N. Veregin, Gwynne McAneney-Lannen, Edward G. Zwartz, Maria N. V. McDougall, Guerino Sacripante, Karen A. Moffat
  • Toner compositions
    Patent number: 8211607
    Abstract: Toner particles are provided which may, in embodiments, include a gel. In embodiments, the toner particles may have a core-shell configuration, with the gel in the core, the shell, or both. The gel may prevent a crystalline resin in the core of the toner particles from migrating to the toner surface.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: July 3, 2012
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Karen Ann Moffat, Edward G. Zwartz, Richard P. N. Veregin, Maria N. V. McDougall
  • Toner compositions
    Patent number: 8197998
    Abstract: Toner particles are provided which may, in embodiments, include a core and a shell. In embodiments, charge control agents may be co-emulsified with a resin utilized to form a shell. The shell may prevent a crystalline resin in the core from migrating to the toner surface. Inclusion of the charge control agent in the shell itself may provide the resulting toner particles with desirable charge characteristics and sensitivity to relative humidity.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: June 12, 2012
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Maria N. V. McDougall, Karen A. Moffat, Richard P. N. Veregin, Enno E. Agur
  • Toner compositions and processes
    Patent number: 8187780
    Abstract: Environmentally friendly toner particles are provided which may, in embodiments, include a biodegradable semi-crystalline polyester resin and a biodegradable amorphous polyester resin.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: May 29, 2012
    Assignee: Xerox Corporation
    Inventors: Gwynne McAneney-Lannen, Guerino G. Sacripante, Edward G. Zwartz, Maria N. V. McDougall
  • Toner process
    Patent number: 8178274
    Abstract: The present disclosure provides toners and processes for preparing toner particles possessing excellent charging characteristics. The process includes forming a dispersion including at least one organic and/or organometallic charge control agent, and then combining that dispersion with an emulsion suitable for use in forming toner particles.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: May 15, 2012
    Assignee: Xerox Corporation
    Inventors: Enno E. Agur, Daryl W. Vanbesien, Ke Zhou, Michael S. Hawkins, Maria N. V. McDougall, Richard P. N. Veregin, Edward G. Zwartz
  • Toner compositions
    Patent number: 8133649
    Abstract: Toner particles are provided which may, in embodiments, include a high molecular weight branched or cross-linked polyester to decrease image gloss and to increase toner elasticity to prevent surface additives impaction. In embodiments, the toner particles may have a core-shell configuration, with the high molecular weight polyester in the core, the shell, or both.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: March 13, 2012
    Assignee: Xerox Corporation
    Inventors: Maria N. V. McDougall, Ke Zhou, Edward G. Zwartz, Daryl W. Vanbesien, John L. Pawlak, Paul J. Gerroir, Suxia Yang, Richard P. N. Veregin, Karen Ann Moffat
  • Ink carriers containing surface modified nanoparticles, phase change inks including same, and methods for making same
    Patent number: 8123344
    Abstract: An ink carrier comprising a dispersion of at least one of silica nanoparticles surface modified with a hydrophobic group or metal oxide nanoparticles surface modified with a hydrophobic group exhibiting a substantially uniform distribution of said nanoparticles discretely distributed therewithin, said ink carrier being resistant to substantial aggregation of said nanoparticles distributed therewithin.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: February 28, 2012
    Assignee: Xerox Corporation
    Inventors: Adela Goredema, Maria N. V. McDougall, C. Geoffrey Allen
  • Toners containing polyhedral oligomeric silsesquioxanes
    Patent number: 8084177
    Abstract: Disclosed is a toner composition comprising toner particles which comprise a resin, an optional colorant, and a polyhedral oligomeric silsesquioxane compound.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: December 27, 2011
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Karen A. Moffat, Maria N V. McDougall, Richard P N. Veregin, Edward G. Zwartz
  • Toner compositions
    Patent number: 8084180
    Abstract: Toner particles are provided which may, in embodiments, include a core possessing at least one polyester resin in combination with a colorant, optional wax, and optional other additives, and a shell over the core including a high molecular weight amorphous polyester resin. The high molecular weight amorphous polyester resin in the shell may prevent any crystalline polyester resin in the core from migrating to the toner surface.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: December 27, 2011
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Maria N. V. McDougall, Edward G. Zwartz, Karen Ann Moffat, Paul J. Gerroir
  • Toners containing polyhedral oligomeric silsesquioxanes
    Patent number: 7985523
    Abstract: Disclosed is a toner composition comprising toner particles which comprise (a) a resin having chemically bonded thereto a polyhedral oligomeric silsesquioxane, (b) and an optional colorant.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: July 26, 2011
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Maria N V. McDougall, Yu Qi, Jordan Wosnick, Karen A. Moffat, Paul J. Gerroir, Richard P N. Veregin
  • Toner compositions
    Patent number: 7981584
    Abstract: Toner particles are provided which may, in embodiments, include a core possessing an amorphous resin and a crystalline resin in combination with a colorant, optional wax, and optional other additives, and a shell over the core including a branched amorphous resin. The branched resin in the shell may prevent the crystalline resin from migrating to the toner surface.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: July 19, 2011
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Karen Ann Moffat, Maria N. V. McDougall, Richard P. N. Veregin
  • Nano-sized composites containing polymer modified clays and method for making toner particles using same
    Patent number: 7939237
    Abstract: A method for making toners to include clay composites. The clay composites are incorporated into emulsion of toner and used in making toner via emulsion aggregation. Such toners may have a core and/or a shell and the clay composites may be included with the core, the shell or both.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: May 10, 2011
    Assignee: Xerox Corporation
    Inventors: Maria N. V. McDougall, Richard P. N. Veregin, Guerino G. Sacripante, Valerie M. Farrugia
  • TONER COMPOSITIONS
    Publication number: 20110091805
    Abstract: Toner particles are provided which may, in embodiments, include an additive package including a titanium dioxide that has been subjected to a fluorine treatment. In embodiments, additional additives, including a silica, optionally in combination with a metal salt of a fatty acid, for example a zinc stearate, may be included. The additives provide toners with excellent charging characteristics and good blocking performance.
    Type: Application
    Filed: October 21, 2009
    Publication date: April 21, 2011
    Applicant: XEROX CORPORATION
    Inventors: Maria N.V. McDougall, Richard P.N. Veregin, Eric Rotberg, Michael S. Hawkins
  • Predicting relative humidity sensitivity of developer materials
    Patent number: 7910277
    Abstract: A method of predicting a Lewis acid-base relative humidity (RH) ratio in a two-component developer comprised of at least a toner and a carrier including selecting a candidate toner, selecting a candidate carrier, and determining the Lewis acid and Lewis base constants for the candidate toner and candidate carrier. In addition, calculating the Lewis acid-base RH ratio wherein the calculated Lewis acid-base RH ratio is related to charge RH ratio.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: March 22, 2011
    Assignee: Xerox Corporation
    Inventors: Richard P. N. Veregin, Maria N. V. McDougall, Michael S. Hawkins, Cuong Vong, Vladislav Skorokhod
  • Chemical toner with covalently bonded release agent
    Patent number: 7901859
    Abstract: A chemical toner composition including a polymer polymerized from starting ingredients comprising a resin monomer and a release agent monomer.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: March 8, 2011
    Assignee: Xerox Corporation
    Inventors: Daryl W Vanbesien, Edward G Zwartz, Cuong Vong, Maria N V McDougall, Timothy P Bender, Jennifer L Belelie, Tyler Norsten
  • Toner particles having nano-sized composites containing polymer modified clays
    Patent number: 7892714
    Abstract: A toner comprising toner particles, a polymer binder, at least one colorant and clay composites distributed in the polymer binder, wherein the clay composites comprise a polymer modified clay.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: February 22, 2011
    Assignee: Xerox Corporation
    Inventors: Maria N. V. McDougall, Richard P. N. Veregin, Guerino G. Sacripante, Valerie M. Farrugia