Patents by Inventor C. Geoffrey Allen

C. Geoffrey Allen 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).

  • PREPARATION OF PIGMENT DISPERSIONS
    Publication number: 20140295338
    Abstract: A method for preparing a pigment dispersion includes milling a starting pigment dispersion containing a pigment and optionally a carrier and a dispersant with milling media having an average particle size of about 100 ?m or less, until a final pigment dispersion having at least one of a desired pigment average particle size and a desired pigment particle size distribution is obtained; optionally separating the milling media from the final pigment dispersion; and optionally diluting the final pigment dispersion to obtain a desired pigment particle concentration.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Applicant: XEROX CORPORATION
    Inventors: Barkev KEOSHKERIAN, C. Geoffrey ALLEN, Naveen CHOPRA, Michelle N. CHRETIEN, Daryl W. VANBESIEN, Jenny ELIYAHU
  • Method of making nanosized particles of phthalocyanine pigments
    Patent number: 8809523
    Abstract: Nanoscale pigment particles of phthalocyanine pigments are prepared by providing a unsubstituted phthalocyanine chromogen material and a substituted phthalocyanine chromogen material, reacting the unsubstituted phthalocyanine chromogen material and the substituted phthalocyanine chromogen material to form a mixture of unsubstituted phthalocyanine dye molecules and substituted phthalocyanine dye molecules, and causing the substituted phthalocyanine dye molecules to non-covalently associate with the unsubstituted phthalocyanine dye molecules, so as to limit an extent of particle growth and aggregation and result in nanoscale pigment particles.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: August 19, 2014
    Assignee: Xerox Corporation
    Inventors: James D. Mayo, Rina Carlini, C. Geoffrey Allen
  • Phase change inks containing quinacridone pigments and synergists
    Patent number: 8808437
    Abstract: Disclosed is a phase change ink comprising (i) an ink carrier; (ii) a quinacridone pigment; (iii) a synergist of the formula or mixtures thereof, wherein R1, R2, R3, R4, R5, R6, R7, R8, R10, R11, and x are as defined herein; and (iv) a pigment dispersant; said phase change ink being a solid at about 25° C.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: August 19, 2014
    Assignee: Xerox Corporation
    Inventors: Maria M. Birau, C. Geoffrey Allen, Biby E. Abraham, Peter G. Odell
  • Ink for digital offset printing applications
    Patent number: 8771787
    Abstract: An ink composition useful for digital offset printing applications comprises a colorant and a plurality of curable compounds. The compounds have Hansen solubility parameters as described herein, and the resulting ink composition is both compatible with certain dampening fluids and has certain rheological properties, including a low viscosity.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: July 8, 2014
    Assignees: Xerox Corporation, Palo Alto Research Center Incorporated
    Inventors: Marcel P. Breton, Frank Ping-Hay Lee, Aurelian Valeriu Magdalinis, Bing R. Hsieh, Stephan Drappel, Timothy D. Stowe, C. Geoffrey Allen, Peter Gordon Odell
  • Phase Change Ink Composition And Process For Preparing Same
    Publication number: 20140176652
    Abstract: A process for preparing a phase change ink including (a) subjecting a white colorant to acoustic mixing at an acceleration of from about 30 to about 110 g; (b) optionally, adding a dispersant and subjecting the white colorant and dispersant to further acoustic mixing at an acceleration of from about 30 to about 110 g; (c) separately melt mixing an optional antioxidant, an optional synergist, and a phase change ink carrier comprising (i) a branched triamide and (ii) a polyethylene wax, a Fischer Tropsch wax, or a mixture or combination thereof, to form a melt mixture; (d) adding the melt mixture of (c) to the acoustically mixed white colorant of (a) or (b) with stirring; (e) optionally, adding a fluorescent dye with stirring; and (d) optionally, filtering the phase change ink.
    Type: Application
    Filed: December 21, 2012
    Publication date: June 26, 2014
    Applicant: XEROX CORPORATION
    Inventors: Salma Falah Toosi, Mihaela Maria Birau, Biby Esther Abraham, Gabriel Iftime, James D. Mayo, C. Geoffrey Allen
  • Phase Change Ink Comprising Modified Naturally-Derived Colorants
    Publication number: 20140152748
    Abstract: A phase change ink composition comprising an ink vehicle; an optional dispersant; and a modified naturally-derived colorant comprising a naturally-derived colorant that is modified with an aliphatic quaternary ammonium salt, an aromatic quaternary ammonium salt, or a mixture or combination thereof. The modified naturally-derived colorant is compatible with phase change ink vehicles.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Applicant: XEROX CORPORATION
    Inventors: Salma Falah Toosi, Mihaela Maria Birau, C. Geoffrey Allen, Caroline Turek, Biby Esther Abraham, Peter G. Odell, Nathan Mark Bamsey, Gabriel Iftime
  • SURFACE LAYER
    Publication number: 20140154502
    Abstract: There is described a surface layer or coating of a fluoropolymer. Dispersed in the fluoropolymer is a compound of the formula: wherein R1, R2, R3, and R4 each, independently of the others, are —H, alkyl, aryl, arylalkyl, or alkylaryl, R is a group of the formula —COOH, —COOM, —R5—COOH, —R5—COOM, —X—R5—COOH, or —X—R5—COOM wherein X and R5 are as defined herein, M is a cationic metal, A represents a saccharide monomer repeating unit having one or more R groups, B represents a saccharide monomer repeating unit having no R groups, m is an integer representing the number of repeating A units, and n is an integer representing the number of repeating B units.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Applicant: XEROX CORPORATION
    Inventors: Mihaela M. Birau, Salma F. Toosi, Biby E. Abraham, Christopher A. Wagner, C. Geoffrey Allen, Peter G. Odell, Daryl W. Vanbesien, Carolyn P. Moorlag
  • Modified Naturally-Derived Colorants For Phase Change Ink Applications
    Publication number: 20140155625
    Abstract: A modified naturally-derived colorant comprising a naturally-derived colorant that is modified with an aliphatic quaternary ammonium salt, an aromatic quaternary ammonium salt, or a mixture or combination thereof. The modified naturally-derived colorant is compatible with phase change ink vehicles.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Applicant: XEROX CORPORATION
    Inventors: Mihaela Maria Birau, Salma Falah Toosi, C. Geoffrey Allen, Biby Esther Abraham, Peter G. Odell, Sandra J. Gardner
  • Phase change ink compositions containing lignosulfonate compounds
    Patent number: 8741041
    Abstract: A phase change ink composition includes a carrier; an optional colorant; and a lignosulfonate compound of the formula wherein R is hydrogen or and wherein the cationic counterion+ is a nitrogen-alkyl cationic counterion, a nitrogen-aryl cationic counterion, a nitrogen-alkylaryl cationic counterion, or a nitrogen arylalkyl cationic counterion; and wherein the cationic counterion contains at least eight carbon atoms.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: June 3, 2014
    Assignee: Xerox Corporation
    Inventors: Mihaela Maria Birau, C. Geoffrey Allen, Salma Falah Toosi, Biby Esther Abraham, Peter G. Odell
  • Phase Change Inks Containing Quinacridone Pigments and Synergists
    Publication number: 20140144348
    Abstract: Disclosed is a phase change ink comprising (i) an ink carrier; (ii) a quinacridone pigment; (iii) a synergist of the formula or mixtures thereof, wherein R1, R2, R3, R4, R5, R6, R7, R8, R10, R11, and x are as defined herein; and (iv) a pigment dispersant; said phase change ink being a solid at about 25° C.
    Type: Application
    Filed: November 26, 2012
    Publication date: May 29, 2014
    Applicant: XEROX CORPORATION
    Inventors: Maria M. Birau, C. Geoffrey Allen, Biby E. Abraham, Peter G. Odell
  • Solid Red Ink Formulations
    Publication number: 20140128518
    Abstract: A solid ink including an ink vehicle and a colorant, the colorant includes an orange colorant and a red colorant, where the orange colorant absorbs light having a wavelength of from about 400 to about 560 nm, and where the red colorant absorbs light having a wavelength of from about 510 to 580 nm. The ink substantially matches PANTONE® Red 032 or PANTONE® Warm red.
    Type: Application
    Filed: November 2, 2012
    Publication date: May 8, 2014
    Applicant: XEROX CORPORATION
    Inventors: Valerie M. Farrugia, C. Geoffrey Allen, Jordan H. Wosnick, Eric Rotberg, Karen A. Moffat, Richard P.N. Veregin, Suxia Yang, Biby E. Abraham
  • Red Toners
    Publication number: 20140127619
    Abstract: Red toners that approximate PANTONE® Red 032 and PANTONE® Warm Red are described. The colorant includes an orange colorant and a red colorant, where the orange colorant absorbs light having a wavelength of from about 400 to about 520 nm, and where the red colorant absorbs light having a wavelength of from about 500 to 580 nm.
    Type: Application
    Filed: November 2, 2012
    Publication date: May 8, 2014
    Applicant: XEROX CORPORATION
    Inventors: Valerie M. Farrugia, Jordan H. Wosnick, Eric Rotberg, Karen A. Moffat, Richard PN Veregin, Suxia Yang, C Geoffrey Allen
  • Phase change inks containing novel synergist
    Patent number: 8714724
    Abstract: A phase change ink composition including a pigment; a carrier; a dispersant; and a copper phthalocyanine synergist having a carboxylic acid group thereon.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 6, 2014
    Assignee: Xerox Corporation
    Inventors: James D. Mayo, C. Geoffrey Allen, Salma Falah Toosi, Mihaela Maria Birau, Caroline Turek
  • Lignosulfonate compounds for solid ink applications
    Patent number: 8703981
    Abstract: A lignosulfonate compound for phase change ink of the formula wherein R is hydrogen or and wherein the cationic counterion+ is a nitrogen-alkyl cationic counterion, a nitrogen-aryl cationic counterion, a nitrogen-alkylaryl cationic counterion, or a nitrogen arylalkyl cationic counterion; and wherein the cationic counterion contains at least eight carbon atoms.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: April 22, 2014
    Assignee: Xerox Corporation
    Inventors: Mihaela Maria Birau, C. Geoffrey Allen, Salma Falah Toosi, Biby Esther Abraham, Peter G. Odell
  • Phase change ink containing synergist for pigment dispersion
    Patent number: 8696100
    Abstract: A phase change ink composition including a pigment; a carrier; a dispersant; and a synergist, (a) wherein, for a given sample of the synergist, about 80 to about 100 percent of the sample has a volume average particle diameter of about 50 to about 200 nanometers; (b) wherein the synergist has a surface area of about 30 to about 100 m2/gram; and (c) wherein the synergist has a density of above about 0.6 to about 2 grams/cm3.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: April 15, 2014
    Assignee: Xerox Corporation
    Inventors: James D. Mayo, C. Geoffrey Allen, Salma Falah Toosi, Mihaela Maria Birau, Biby Esther Abraham
  • PHASE CHANGE INK CONTAINING SYNERGIST FOR PIGMENT DISPERSION
    Publication number: 20140092165
    Abstract: A phase change ink composition including a pigment; a carrier; a dispersant; and a synergist, (a) wherein, for a given sample of the synergist, about 80 to about 100 percent of the sample has a volume average particle diameter of about 50 to about 200 nanometers; (b) wherein the synergist has a surface area of about 30 to about 100 m2/gram; and (c) wherein the synergist has a density of above about 0.6 to about 2 grams/cm3.
    Type: Application
    Filed: October 2, 2012
    Publication date: April 3, 2014
    Applicant: Xerox Corporation
    Inventors: James D. Mayo, C. Geoffrey Allen, Salma Falah Toosi, Mihaela Maria Birau, Biby Esther Abraham
  • Phase Change Inks Containing Novel Synergist
    Publication number: 20140092182
    Abstract: A phase change ink composition including a pigment; a carrier; a dispersant; and a copper phthalocyanine synergist having a carboxylic acid group thereon.
    Type: Application
    Filed: October 2, 2012
    Publication date: April 3, 2014
    Applicant: XEROX CORPORATION
    Inventors: James D. Mayo, C. Geoffrey Allen, Salma Falah Toosi, Mihaela Maria Birau, Caroline Turek
  • Radiation curable red gel ink formulations
    Patent number: 8686062
    Abstract: A radiation curable ink including at least one curable monomer, at least one organic gellant, at least one photoinitiator, and a colorant, the colorant includes an orange colorant and an red colorant, where the orange colorant absorbs light having a wavelength of from about 400 to about 560 nm, and where the red colorant absorbs light having a wavelength of from about 460 to 580 nm. The ink substantially matches PANTONE® Red 032 or PANTONE® Warm Red.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: April 1, 2014
    Assignee: Xerox Corporation
    Inventors: Valerie M Farrugia, C Geoffrey Allen, Jordan H Wosnick, Eric Rotberg, Karen A Moffat, Richard P N Veregin, Suxia Yang, Barkev Keoshkerian, Biby E Abraham
  • Phase Change Ink Comprising A Polyhydroxyalkanoate Compound
    Publication number: 20140083325
    Abstract: A phase change ink including an amorphous compound; a crystalline compound; an optional colorant; an optional synergist; an optional dispersant; and at least one polyhydroxyalkanoate compound of the formula wherein R is independently selected from the group consisting of a hydrogen atom, a hydrocarbon group, a heteroatom, and combinations thereof; wherein n represents the number of repeating units of from 1 to about 35,000; and wherein x represents an integer from 1 to about 5.
    Type: Application
    Filed: September 24, 2012
    Publication date: March 27, 2014
    Applicant: XEROX CORPORATION
    Inventors: Caroline M. Turek, Guerino G. Sacripante, Daryl W. Vanbesien, Corey L. Tracy, C. Geoffrey Allen
  • Phase Change Ink with Compostable Wax
    Publication number: 20140073723
    Abstract: Disclosed is a phase change ink comprising: (a) an ink carrier comprising a compostable paraffin or polymethylene wax; and (b) a colorant.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 13, 2014
    Applicant: XEROX CORPORATION
    Inventors: Salma F. Toosi, Maria M. Birau, Biby E. Abraham, James D. Mayo, Peter G. Odell, C. Geoffrey Allen