Patents by Inventor Maria V. McDougall

Maria 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).

  • Carrier particles with halosilanated pigments
    Patent number: 6268100
    Abstract: A carrier comprised of a carrier core, optional polymer coating, and fluorosilanated pigment coating.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: July 31, 2001
    Assignee: Xerox Corporation
    Inventors: Michael F. Cunningham, Richard P. N. Veregin, Carl P. Tripp, Thomas E. Enright, Maria V. McDougall, John A. Creatura
  • Carrier particles with halosilanated pigments
    Patent number: 6180311
    Abstract: A carrier comprised of a carrier core, optional polymer coating, and fluorosilanated pigment coating.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: January 30, 2001
    Assignee: Xerox Corporation
    Inventors: Michael F. Cunningham, Richard P. N. Veregin, Carl P. Tripp, Thomas E. Enright, Maria V. McDougall, John A. Creatura
  • Aggregation processes
    Patent number: 5744520
    Abstract: A process for the preparation of polymer compositions which comprises mixing a conductive component with an anionic polymeric latex containing a polymer; adding a cationic surfactant, or flocculant whereby the aggregation of the latex particles and the conductive component particles results; subsequently adding colloidal stabilizer, followed by the addition of a base to obtain a pH of from about 7 to about 12; heating above about the polymer glass transition temperature thereby enabling the severage, or breakage of the formed aggregated particles; further heating above about the polymer glass transition temperature enabling the coalescence of the polymer and conductive component particles; and optionally washing and drying the resulting coalesced product.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: April 28, 1998
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Richard P. N. Veregin, Raj D. Patel, Michael A. Hopper, Maria V. McDougall
  • Coated carriers by aggregation processes
    Patent number: 5565296
    Abstract: A process for the preparation of polymer compositions which comprises mixing a conductive component with an anionic polymeric latex containing a polymer; adding a cationic surfactant, or flocculant whereby the aggregation of the latex particles and the conductive component particles results; subsequently adding colloidal stabilizer, followed by the addition of a base to obtain a pH of from about 7 to about 12; heating above about the polymer glass transition temperature thereby enabling the severage, or breakage of the formed aggregated particles; further heating above about the polymer glass transition temperature enabling the coalescence of the polymer and conductive component particles; and optionally washing and drying the resulting coalesced product.
    Type: Grant
    Filed: July 3, 1995
    Date of Patent: October 15, 1996
    Assignee: Xerox Corporation
    Inventors: Grazyna E. Kmiecik-Lawrynowicz, Richard P. N. Veregin, Raj D. Patel, Michael A. Hopper, Maria V. McDougall
  • Toner compositions with halosilanated pigments
    Patent number: 5484675
    Abstract: A toner composition comprised of resin and pigment particles where the pigment particles are treated with a fluorosilane polymer.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: January 16, 1996
    Assignee: Xerox Corporation
    Inventors: Carl P. Tripp, Richard P. N. Veregin, Michael F. Cunningham, Thomas E. Enright, Maria V. McDougall
  • Toner compositions with styrene terpene resins
    Patent number: 5364723
    Abstract: Disclosed is a toner composition comprised of pigment particles and monovinyl aromatic terpene copolymer resin particles, and more specifically styrene terpene copolymer resins.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: November 15, 1994
    Assignee: Xerox Corporation
    Inventors: Michael K. Georges, Nancy A. Listigovers, Stephan V. Drappel, Maria V. McDougall, Gerald R. Allison