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).

  • Patent number: 6808851
    Abstract: A process for the preparation of emulsion aggregation toner particles with high pigment loading having a reduced number of wax protrusions on the surface of the toner particles and fewer coarse toner particles. The process includes the introduction of a wax having a molecular weight between about 500 and 2,500, or a blend of waxes having different a molecular weight between 500 and 2,500.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: October 26, 2004
    Assignee: Xerox Corporation
    Inventors: Joseph A. Bartel, Patricia A. Burns, Raj D. Patel, Enno E. Agur, Danielle C. Boils, Edward G. Zwartz, Paul J. Gerroir, Maria N. V. McDougall
  • Patent number: 6780559
    Abstract: A toner process involving mixing a colorant dispersion and a metal oxide with a latex emulsion comprised of polymer, water, and an anionic surfactant, adding a cationic coagulant followed by heating the mixture to a temperature below about the glass transition temperature (Tg) of the latex polymer particles to provide toner size aggregates comprised of polymer pigment and dye, heating above about the Tg of the polymer and isolating the resulting product.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: August 24, 2004
    Assignee: Xerox Corporation
    Inventors: Richard P. N. Veregin, Raj D. Patel, Maria N. V. McDougall
  • Publication number: 20040152007
    Abstract: Disclosed is a toner comprising particles of a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a ballistic aerosol marking process using the toner.
    Type: Application
    Filed: January 21, 2004
    Publication date: August 5, 2004
    Applicant: Xerox Corporation.
    Inventors: James R. Combes, Karen A. Moffat, Maria N.V. McDougall
  • Publication number: 20040137357
    Abstract: A process for the preparation of emulsion aggregation toner particles with high pigment loading having a reduced number of wax protrusions on the surface of the toner particles and fewer coarse toner particles. The process includes the introduction of a wax having a molecular weight between about 500 and 2,500, or a blend of waxes having different a molecular weight between 500 and 2,500.
    Type: Application
    Filed: January 15, 2003
    Publication date: July 15, 2004
    Inventors: Joseph A. BARTEL, Patricia A. BURNS, Raj D. PATEL, Enno E. AGUR, Danielle C. BOILS, Edward G. ZWARTZ, Paul J. GERROIR, Maria N.V. MCDOUGALL
  • Patent number: 6743559
    Abstract: Disclosed is a toner comprising particles of a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: June 1, 2004
    Assignee: Xerox Corporation
    Inventors: James R. Combes, Karen A. Moffat, Maria N. V. McDougall
  • Patent number: 6730450
    Abstract: Disclosed is a toner comprising particles of a polyester resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a polyester resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: May 4, 2004
    Assignee: Xerox Corporation
    Inventors: Karen A. Moffat, Rina Carlini, Maria N. V. McDougall, Dan A. Hays, Jack T. LeStrange
  • Patent number: 6719399
    Abstract: Disclosed is a process for depositing marking material onto a substrate which comprises (a) providing a propellant to a printhead, said printhead having defined therein at least one channel, each channel having an inner surface and an exit orifice with a width no larger than about 250 microns through which the propellant can flow, said propellant flowing through each channel, thereby forming a propellant stream having kinetic energy, each channel directing the propellant stream toward the substrate, the inner surface of each channel having thereon a conductive polymer coating; and (b) controllably introducing a particulate marking material into the propellant stream in each channel, wherein the kinetic energy of the propellant stream causes the particulate marking material to impact the substrate.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: April 13, 2004
    Assignee: Xerox Corporation
    Inventors: Karen A. Moffat, Jaan Noolandi, Armin R. Volkel, Maria N. V. McDougall, David N. MacKinnon, James R. Combes, Edward G. Zwartz
  • Publication number: 20040058268
    Abstract: A toner process involving mixing a colorant dispersion and a metal oxide with a latex emulsion comprised of polymer, water, and an anionic surfactant, adding a cationic coagulant followed by heating the mixture to a temperature below about the glass transition temperature (Tg) of the latex polymer particles to provide toner size aggregates comprised of polymer pigment and dye, heating above about the Tg of the polymer and isolating the resulting product.
    Type: Application
    Filed: August 7, 2002
    Publication date: March 25, 2004
    Applicant: Xerox Corporation
    Inventors: Richard P. N. Veregin, Raj D. Patel, Maria N.V. McDougall
  • Patent number: 6699633
    Abstract: Disclosed is a toner comprising particles of a polyester resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a polyester resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: March 2, 2004
    Assignee: Xerox Corporation
    Inventors: Karen A. Moffat, Rina Carlini, Maria N. V. McDougall, Dan A. Hays, Jack T. LeStrange
  • Patent number: 6689527
    Abstract: Disclosed is a toner comprising particles of a vinyl resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a vinyl resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: February 10, 2004
    Assignee: Xerox Corporation
    Inventors: Karen A. Moffat, Maria N. V. McDougall, Rina Carlini, Dan A. Hays, Jack T. LeStrange, Paul J. Gerroir
  • Patent number: 6686111
    Abstract: Disclosed is a toner comprising particles of a vinyl resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a vinyl resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: February 3, 2004
    Assignee: Xerox Corporation
    Inventors: Karen A. Moffat, Maria N. V. McDougall, Rina Carlini, Dan A. Hays, Jack T. LeStrange, Paul J. Gerroir
  • Patent number: 6673501
    Abstract: Disclosed is a toner comprising particles of a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: January 6, 2004
    Assignee: Xerox Corporation
    Inventors: James R. Combes, Karen A. Moffat, Maria N. V. McDougall
  • Publication number: 20030202032
    Abstract: Disclosed is a process for depositing marking material onto a substrate which comprises (a) providing a propellant to a printhead, said printhead having defined therein at least one channel, each channel having an inner surface and an exit orifice with a width no larger than about 250 microns through which the propellant can flow, said propellant flowing through each channel, thereby forming a propellant stream having kinetic energy, each channel directing the propellant stream toward the substrate, the inner surface of each channel having thereon a conductive polymer coating; and (b) controllably introducing a particulate marking material into the propellant stream in each channel, wherein the kinetic energy of the propellant stream causes the particulate marking material to impact the substrate.
    Type: Application
    Filed: May 16, 2003
    Publication date: October 30, 2003
    Applicant: Xerox Corporation
    Inventors: Karen A. Moffat, Jaan Noolandi, Armin R. Volkel, Maria N. V. McDougall, David N. MacKinnon, James R. Combes, Edward G. Zwartz
  • Publication number: 20030175609
    Abstract: Disclosed is a toner comprising particles of a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a polyester resin, an optional colorant, and polypyrrole, wherein said toner particles are prepared by an emulsion aggregation process.
    Type: Application
    Filed: January 23, 2003
    Publication date: September 18, 2003
    Applicant: Xerox Corporation
    Inventors: James R. Combes, Karen A. Moffat, Maria N.V. McDougall
  • Publication number: 20030170556
    Abstract: Disclosed is a toner comprising particles of a polyester resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a polyester resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process.
    Type: Application
    Filed: January 21, 2003
    Publication date: September 11, 2003
    Applicant: Xerox Corporation
    Inventors: Karen A. Moffat, Rina Carlini, Maria N.V. McDougall, Dan A. Hays, Jack T. LeStrange
  • Patent number: 6598954
    Abstract: Disclosed is an apparatus for depositing a particulate marking material onto a substrate, comprising (a) a printhead having defined therein at least one channel, each channel having an inner surface and an exit orifice with a width no larger than about 250 microns, the inner surface of each channel having thereon a conductive polymer coating; (b) a propellant source connected to each channel such that propellant provided by the propellant source can flow through each channel to form propellant streams therein, the propellant streams having kinetic energy, each channel directing the propellant stream through the exit orifice toward the substrate; and (c) a marking material reservoir having an inner surface, the inner surface having thereon the conductive polymer coating, the reservoir containing particles of a particulate marking material, the reservoir being communicatively connected to each channel such that the particulate marking material from the reservoir can be controllably introduced into the propellan
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: July 29, 2003
    Assignee: Xerox Corporation
    Inventors: Karen A. Moffat, Jaan Noolandi, Armin R. Volkel, Maria N. V. McDougall, David N. MacKinnon, James R. Combes, Edward G. Zwartz
  • Patent number: 6589702
    Abstract: Disclosed is a toner comprising particles of a resin and an optional colorant, said toner particles having coated thereon a polypyrrole. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a resin and an optional colorant, said toner particles having coated thereon a polypyrrole.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: July 8, 2003
    Assignee: Xerox Corporation
    Inventors: Karen A. Moffat, Rina Carlini, Maria N. V. McDougall, Dan A. Hays, Jack T. LeStrange, James R. Combes
  • Publication number: 20030113651
    Abstract: Disclosed is a toner comprising particles of a vinyl resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a vinyl resin, an optional colorant, and poly(3,4-ethylenedioxythiophene), wherein said toner particles are prepared by an emulsion aggregation process.
    Type: Application
    Filed: January 14, 2003
    Publication date: June 19, 2003
    Applicant: Xerox Corporation
    Inventors: Karen A. Moffat, Maria N.V. McDougall, Rina Carlini, Dan A. Hays, Jack T. LeStrange, Paul J. Gerroir
  • Patent number: 6569591
    Abstract: Disclosed is a toner comprising particles of a resin and an optional colorant, said toner particles having coated thereon a polythiophene. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member with charged toner particles comprising a resin and an optional colorant, said toner particles having coated thereon a polythiophene.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: May 27, 2003
    Assignee: Xerox Corporation
    Inventors: Karen A. Moffat, Maria N. V. McDougall, Rina Carlini, Dan A. Hays, Jack T. LeStrange, Paul J. Gerroir
  • Publication number: 20030059702
    Abstract: Disclosed is a toner comprising particles of a resin and an optional colorant, said toner particles having coated thereon a polythiophene. Another embodiment of the present invention is directed to a process which comprises (a) generating an electrostatic latent image on an imaging member, and (b) developing the latent image by contacting the imaging member, with charged toner particles comprising a resin and an optional colorant, said toner particles having coated thereon a polythiophene.
    Type: Application
    Filed: September 24, 2002
    Publication date: March 27, 2003
    Applicant: Xerox Corporation
    Inventors: Karen A. Moffat, Maria N.V. McDougall, Rina Carlini, Dan A. Hays, Jack T. LeStrange, Paul J. Gerroir