Patents by Inventor Maura A. Sweeney

Maura A. Sweeney 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: 7402370
    Abstract: A toner for developing electrostatic images in a single component development (SCD) system free of carrier and including emulsion aggregation toner particles of a styrene acrylate polymer binder, at least one release agent and at least one colorant, wherein the toner particles have a volume average particle size of from about 5 ?m to about 10 ?m, an average circularity of about 0.95 to about 0.99, a volume and number geometric standard deviation (GSDv and n) of from about 1.10 to about 1.30, and an onset glass transition temperature of from about 45° C. to about 65° C., is ideally suited for forming an image using a single component image forming device.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: July 22, 2008
    Assignee: Xerox Corporation
    Inventors: Grazyna E Kmiecik-Lawrynowicz, Maura A Sweeney, Daniel W Asarese, Eunhee Lee, Robert D Bayley
  • Publication number: 20080070141
    Abstract: A toner having a core with at least one resin and at least one colorant, and having on a surface thereof, an additive package including fluorinated polymer particles, and a method of forming toner particles having surface particles attached thereto, wherein the surface particles include fluorinated polymer particles, and the method includes aggregating a material with at least one resin and at least one colorant to produce toner particles, following aggregation, forming a mixture of the surface particles and the toner particles, and subjecting the mixture to a temperature above the glass transition temperature of the toner particles to coalesce the toner particles, whereby the surface particles become at least partially embedded within the surface of the toner particles.
    Type: Application
    Filed: September 19, 2006
    Publication date: March 20, 2008
    Inventors: Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Robert D. Bayley
  • Patent number: 7344813
    Abstract: A toner includes particles of a resin, an optional colorant, a first wax and a second wax, where the toner particles are prepared by an emulsion aggregation process. Additional waxes can also be added for different properties.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: March 18, 2008
    Assignee: Xerox Corporation
    Inventors: Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Matthew L. Fabrizio, Robert D. Bayley, Karen A. Moffat, David J. Sanders, Enno E. Agur, Daryl W. Vanbesien
  • Publication number: 20070298336
    Abstract: A carrier coating that may be used to coat carrier particles, including a specific additive that imparts the coating with superior storage stability and wherein the carrier coating includes an acrylic-based polymeric powder obtained from an emulsion of an acrylic-based polymer, a surfactant, a cationic initiator, and a conductive filler.
    Type: Application
    Filed: June 23, 2006
    Publication date: December 27, 2007
    Applicant: Xerox Corporation
    Inventors: Robert Bayley, Grazyna Kmiecik-Lawrynowicz, Maura Sweeney
  • Patent number: 7276320
    Abstract: A method of forming toner particles having surface particles attached thereto includes the steps of aggregating a material of at least one binder material and at least one colorant to produce toner particles, following aggregation, forming a mixture of the surface particles and the toner particles, and subjecting the mixture to a temperature above the glass transition temperature of the toner particles to coalesce the toner particles, whereby the surface particles become at least partially embedded within the surface of the toner particles. Toner particles prepared by such method include a core comprised of at least one binder and at least one colorant, and surface particles at an external surface of the toner particles, wherein at least about 50% of the surface particles are substantially completely covered by a portion of binder and a majority of the surface particles protrude from the toner particle surface a distance of at least 50% of the average particle size of the surface particles.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: October 2, 2007
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Robert D. Bayley, Ronald J. Koch, Mary L. McStravick, Daniel W. Asarese
  • Publication number: 20070190441
    Abstract: Toner compositions having high molecular weight and improved melt flow are provided.
    Type: Application
    Filed: February 10, 2006
    Publication date: August 16, 2007
    Inventors: Maura Sweeney, Grazyna Kmiecik-Lawrynowicz, Robert Bayley, Kristen Leskow
  • Publication number: 20070141495
    Abstract: Disclosed is a toner particle having at least binder and colorant. The colorant is a dye complex comprising a dye, a nonionic surfactant and a complexing agent. The toner having this colorant exhibits improved color gamut.
    Type: Application
    Filed: December 20, 2005
    Publication date: June 21, 2007
    Applicant: XEROX CORPORATION
    Inventor: Maura Sweeney
  • Publication number: 20070134576
    Abstract: Toner compositions having reduced odor are provided.
    Type: Application
    Filed: December 13, 2005
    Publication date: June 14, 2007
    Inventors: Maura Sweeney, Eugene Young
  • Publication number: 20070048643
    Abstract: A toner for developing electrostatic images in a single component development (SCD) system free of carrier and including emulsion aggregation toner particles of a styrene acrylate polymer binder, at least one release agent and at least one colorant, wherein the toner particles have a volume average particle size of from about 5 ?m to about 10 ?um, an average circularity of about 0.945 to about 0.99, a volume and number geometric standard deviation (GSD,v and n) of from about 1.10 to about 1.30, and an onset glass transition temperature of from about 45° C. to about C., is ideally suited for forming an image using a single component image forming device.
    Type: Application
    Filed: August 30, 2005
    Publication date: March 1, 2007
    Applicant: XEROX CORPORATION
    Inventors: Grazyna Kmiecik-Lawrynowicz, Maura Sweeney, Daniel Asarese, Eunhee Lee, Robert Bayley
  • Publication number: 20060246366
    Abstract: A process for preparing a latex includes polymerizing at least one monomer in the presence of an initiator to form a polymer emulsion; and adding an odor- scavenging bismuth compound to the formed polymer emulsion.
    Type: Application
    Filed: April 27, 2005
    Publication date: November 2, 2006
    Applicant: XEROX CORPORATION
    Inventors: Robert Bayley, Maura Sweeney, Grazyna Kmiecik-Lawrynowicz
  • Publication number: 20060166124
    Abstract: A carrier comprised of a core and a polymer generated from a mixture of two latexes, and wherein the first latex enables a polymer with a high molecular weight, and the second latex enables a polymer with a low molecular weight, and wherein high represents a weight average molecular weight of from about 1,000,000 to about 8,000,000, and said low represents a weight average molecular weight of from about 500,000 to about 750,000.
    Type: Application
    Filed: January 26, 2005
    Publication date: July 27, 2006
    Inventors: Robert Bayley, Grazyna Kmiecik-Lawrynowicz, Maura Sweeney
  • Publication number: 20060160007
    Abstract: A method of forming toner particles having surface particles attached thereto includes the steps of aggregating a material of at least one binder material and at least one colorant to produce toner particles, following aggregation, forming a mixture of the surface particles and the toner particles, and subjecting the mixture to a temperature above the glass transition temperature of the toner particles to coalesce the toner particles, whereby the surface particles become at least partially embedded within the surface of the toner particles. Toner particles prepared by such method include a core comprised of at least one binder and at least one colorant, and surface particles at an external surface of the toner particles, wherein at least about 50% of the surface particles are substantially completely covered by a portion of binder and a majority of the surface particles protrude from the toner particle surface a distance of at least 50% of the average particle size of the surface particles.
    Type: Application
    Filed: January 19, 2005
    Publication date: July 20, 2006
    Applicant: XEROX CORPORATION
    Inventors: Grazyna Kmiecik-Lawrynowicz, Maura Sweeney, Robert Bayley, Ronald Koch, Mary Mcstravick, Daniel Asarese
  • Publication number: 20060063084
    Abstract: Toner, particularly toner made by emulsion aggregation, containing binder resin and colorant containing a pigment dispersion containing pigment particles having an average particle diameter of from about 1 to about 150 nm and/or a pigment dispersion that is transparent.
    Type: Application
    Filed: September 22, 2004
    Publication date: March 23, 2006
    Applicant: XEROX CORPORATION
    Inventors: Maura Sweeney, Dieu Nguyen
  • Publication number: 20050287461
    Abstract: A toner includes particles of a resin, an optional colorant, a first wax and a second wax, where the toner particles are prepared by an emulsion aggregation process. Additional waxes can also be added for different properties.
    Type: Application
    Filed: May 5, 2005
    Publication date: December 29, 2005
    Applicant: XEROX CORPORATION
    Inventors: Maura Sweeney, Grazyna Kmiecik-Lawrynowicz, Matthew Fabrizio, Robert Bayley, Karen Moffat, David Sanders, Enno Agur, Daryl Vanbesien
  • Patent number: 6544321
    Abstract: Disclosed are pigment particles prepared by a process which comprises (a) preparing a solution of a polyalkylene oxide compound in water; (b) preparing a solution of a cationic dye in water; (c) admixing the solution containing the polyalkylene oxide compound with the solution containing the cationic dye to form a mixture; (d) adding to the mixture a solution containing a heteropolyacid in water, an alcohol, or a mixture thereof, thereby resulting in formation of pigment particles having an average particle diameter of no more than about 300 nanometers; and (e) after addition of the heteropolyacid to the mixture, neutralizing the mixture by addition of a base. Another embodiment of the present invention is directed to an ink composition comprising water and the aforementioned pigment particles.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: April 8, 2003
    Assignee: Xerox Corporation
    Inventors: Maura A. Sweeney, Thomas W. Smith, Melvin D. Croucher
  • Patent number: 6468337
    Abstract: Disclosed is a set of inks for printing multicolor images in an ink jet printer, said ink set comprising (1) a first ink having a first color and comprising water and an anionic dye; and (2) a second ink having a second color different from the first color and comprising (a) water, and (b) pigment particles having chemically bonded to the surfaces thereof moieties containing amine or quaternary amine functional groups, wherein the anionic dye in the first ink is capable of being immobilized on a printing substrate by interaction with the pigment particles in the second ink, thereby enabling reduced intercolor bleed.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: October 22, 2002
    Assignee: Xerox Corporation
    Inventors: Kurt B. Gundlach, Richard L. Colt, Maura A. Sweeney, Luis A. Sanchez
  • Patent number: 6424364
    Abstract: A process for creating an image with improved quality and durability by depositing an ink image onto a toner composition residing on a substrate.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: July 23, 2002
    Assignee: Xerox Corporation
    Inventors: Robert W. Gundlach, Kurt B. Gundlach, Luis A. Sanchez, Maura A. Sweeney
  • Publication number: 20010043260
    Abstract: A process including:
    Type: Application
    Filed: June 28, 2001
    Publication date: November 22, 2001
    Applicant: Xerox Corporation
    Inventors: Robert W. Gundlach, Kurt B. Gundlach, Luis A. Sanchez, Maura A. Sweeney
  • Patent number: 6276792
    Abstract: A process including: depositing a colorless toner onto a substrate; depositing at least one ink image onto the colorless toner and substrate; and fixing the resulting ink image onto the substrate.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: August 21, 2001
    Assignee: Xerox Corporation
    Inventors: Robert W. Gundlach, Kurt B. Gundlach, Luis A. Sanchez, Maura A. Sweeney
  • Patent number: 6258873
    Abstract: Disclosed is an ink composition which comprises water, an acid dye, a monovalent salt, a polyquaternary amine compound, and an optional nonionic or cationic surfactant, said ink being substantially free of organic solvents. The ink is particularly suitable for applications such as ink jet printing and marking pens. The disclosed inks in some embodiments are substantially indelible. Also disclosed is a composition for removing the ink compositions from substrates to which they have been applied which comprises water and a dianionic surfactant, optionally further containing a salt, urea, and/or a viscosity building agent such as a gum.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: July 10, 2001
    Assignee: Xerox Corporation
    Inventors: Kurt B. Gundlach, Maura A. Sweeney, Luis A. Sanchez, Richard L. Colt, Melvin D. Croucher