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).

  • Fluorescent ink compositions and fluorescent particles
    Patent number: 8123848
    Abstract: A fluorescent solid ink, and a method for making such ink, including an ink vehicle and a fluorescent particle. The fluorescent particle includes a fluorescent pigment, such as a trans-dicarboxylic-indenofluorenone, and at least one stabilizing wax chemically attached to the fluorescent pigment. The stabilizing wax includes an amine group at its terminal end and the fluorescent pigment includes at least one carboxylic acid group, where the amine group reacts with the carboxylic acid group to form an amide bond.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: February 28, 2012
    Assignee: Xerox Corporation
    Inventors: Maria M. Birau, C. Geoffrey Allen, Carol A. Jennings, Peter G. Odell
  • 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
  • Pigmented phase change inks containing low molecular weight quaternary ammonium salt dispersants
    Patent number: 8118922
    Abstract: A pigmented phase change ink composition comprising an ink vehicle, a dispersant, and pigment particles wherein the dispersant is a chemical compound of formula: wherein R1 is an alkyl group, aryl group, alkylaryl group or arylalkyl group with at least 23 carbon atoms, R2 is an alkylene group, arylene group, alkylarylene group or arylalkylene group with at least 2 carbons and X is a quaternary ammonium salt. The ink can be resistant to substantial aggregation and settling of the pigment particles in the melt and even when exposed to freeze thaw cycles.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: February 21, 2012
    Assignee: Xerox Corporation
    Inventors: Adela Goredema, C. Geoffrey Allen, Caroline M. Turek, Christopher Wagner, Raymond Wong, Mihaela Maria Birau, Sheau Van Kao
  • Low molecular weight quaternary ammonium salt dispersants
    Patent number: 8101801
    Abstract: Disclosed is a chemical compound having the structure: wherein R1 is an all group, aryl group, alkylaryl group or arylalkyl group with at least 23 carbon atoms, R2 is an alkylene group, arylene group, alkyarylene group or arylalkylene group with at least 2 carbons and X is a quaternary ammonium salt.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: January 24, 2012
    Assignee: Xerox Corporation
    Inventors: Adela Goredema, Aaron Strong, Peter Odell, C. Geoffrey Allen, Mihaela Maria Birau
  • FLUORESCENT INK COMPOSITIONS AND FLUORESCENT PARTICLES
    Publication number: 20110265687
    Abstract: A fluorescent solid ink, and a method for making such ink, including an ink vehicle and a fluorescent particle. The fluorescent particle includes a fluorescent pigment, such as a trans-dicarboxylic-indenofluorenone, and at least one stabilizing wax chemically attached to the fluorescent pigment. The stabilizing wax includes an amine group at its terminal end and the fluorescent pigment includes at least one carboxylic acid group, where the amine group reacts with the carboxylic acid group to form an amide bond.
    Type: Application
    Filed: May 3, 2010
    Publication date: November 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Maria M. Birau, C. Geoffrey Allen, Carol A. Jennings
  • FLUORESCENT TONER COMPOSITIONS AND FLUORESCENT PIGMENTS
    Publication number: 20110269065
    Abstract: A fluorescent particle includes a fluorescent pigment, such as a trans-dicarboxylic-indenofluorenone, and at least one stabilizing wax chemically attached to the fluorescent pigment. The stabilizing wax includes an amine group at its terminal end and the fluorescent pigment includes at least one carboxylic acid group, where the amine group reacts with the carboxylic acid group to form an amide bond. A method for making fluorescent particles for use in toners by chemically attaching at least one stabilizing wax to a fluorescent pigment where the at least one stabilizing wax includes an amine group at its terminal end and the fluorescent pigment includes at least one carboxylic acid group. A toner may include a resin and the fluorescent particle.
    Type: Application
    Filed: May 3, 2010
    Publication date: November 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Daryl W. VANBESIEN, Maria M. Birau, C. Geoffrey Allen, Carol A. Jennings, Peter G. Odell
  • Ink carriers containing low viscosity functionalized waxes, phase change inks including same, and methods for making same
    Patent number: 8029861
    Abstract: A phase change ink including a colorant and a carrier including a tri-ester of the formula wherein R1, R2 and R3, and n are as defined herein.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: October 4, 2011
    Assignee: Xerox Corporation
    Inventors: Adela Goredema, Caroline M. Turek, Christopher A. Wagner, C. Geoffrey Allen
  • Nonpolar liquid and solid phase change ink compositions comprising nanosized particles of benzimidazolone pigments
    Patent number: 8025723
    Abstract: An ink composition, such as a nonpolar liquid or phase change (solid) ink composition, that includes a non-polar carrier, and a nanoscale pigment particle composition. The nanoscale pigment particle composition includes a benzimidazolone pigment and a sterically bulky stabilizer compound, which is an alkylated-benzimidazolone compound, associated non-covalently with the benzimidazolone pigment. The presence of the associated stabilizer limits an extent of particle growth and aggregation, to afford nanoscale pigment particles.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: September 27, 2011
    Assignee: Xerox Corporation
    Inventors: Rina Carlini, C. Geoffrey Allen
  • Solid inks incorporating a polyhydroxyalkanoate compound for enhanced properties
    Patent number: 8002399
    Abstract: A solid phase change ink composition that includes at least one colorant and an ink vehicle. The ink vehicle further includes at least one polyhydroxyalkanoate compound of the below formula wherein R is independently selected from the group consisting of a hydrogen atom, a hydrocarbon group, a heteroatom, and combinations thereof, and 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: Grant
    Filed: December 2, 2009
    Date of Patent: August 23, 2011
    Assignee: Xerox Corporation
    Inventors: Caroline M. Turek, Gwynne Evelyn McAneney Lannen, C. Geoffrey Allen, Everett Alan Ness
  • Nonpolar liquid and solid phase change ink compositions comprising nanosized particles of benzimidazolone pigments
    Patent number: 7985290
    Abstract: An ink composition, such as a nonpolar liquid or phase change (solid) ink composition, that includes a non-polar carrier, and a nanoscale pigment particle composition. The nanoscale pigment particle composition includes a benzimidazolone pigment and a sterically bulky stabilizer compound, which is an alkylated derivative of an aromatic acid, associated non-covalently with the benzimidazolone pigment. The presence of the associated stabilizer limits an extent of particle growth and aggregation, to afford nanoscale pigment particles.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: July 26, 2011
    Assignee: Xerox Corporation
    Inventors: Rina Carlini, C. Geoffrey Allen
  • INK COMPOSITIONS
    Publication number: 20110177245
    Abstract: A light-magenta solid ink including an ink vehicle and a colorant. The colorant includes a magenta colorant, a hue-adjusting colorant that absorbs light having a wavelength of from about 400 to about 500 nm, and an optional shade-adjusting colorant that absorbs light having a wavelength of from about 600 to about 700 nm.
    Type: Application
    Filed: January 19, 2010
    Publication date: July 21, 2011
    Applicant: XEROX CORPORATION
    Inventors: Edul N. DALAL, Daryl W. VANBESIEN, Karen A. MOFFAT, Raymond W. WONG, C. Geoffrey ALLEN, Maria Mihaela BIRAU, Richard P.N. VEREGIN, Jordan H. WOSNICK, Valerie M. FARRUGIA
  • INK COMPOSITIONS
    Publication number: 20110177247
    Abstract: A light-cyan solid ink including an ink vehicle and a colorant. The colorant includes a cyan colorant, a hue-adjusting colorant that absorbs light having a wavelength of from about 500 to about 600 run, and an optional shade-adjusting colorant that absorbs light having a wavelength of from about 400 to about 500 nm.
    Type: Application
    Filed: January 19, 2010
    Publication date: July 21, 2011
    Applicant: XEROX CORPORATION
    Inventors: Daryl W. VANBESIEN, Edul N. DALAL, Karen A. MOFFAT, Raymond W. WONG, C. Geoffrey ALLEN, Maria Mihaela BIRAU, Richard P.N. VEREGIN, Jordan H. WOSNICK, Valerie M. FARRUGIA
  • Low molecular weight pigment dispersants for phase change ink
    Patent number: 7973186
    Abstract: Disclosed is a compound of the formula or a mixture thereof; wherein R and R? are the same or different, and wherein R and R? are independently selected from an alkyl group, an arylalkyl group, or an alkylaryl group, wherein the alkyl group, the arylalkyl group, or the alkylaryl group has from about 18 to about 60 carbon atoms; and wherein m is an integer of from about 1 to about 30.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: July 5, 2011
    Assignee: Xerox Corporation
    Inventors: Adela Goredema, Mihaela Maria Birau, C. Geoffrey Allen, Caroline Turek, Maxine E. Haberl, Carol A. Jennings, Peter G. Odell
  • LOW MOLECULAR WEIGHT PIGMENT DISPERSANTS FOR PHASE CHANGE INK
    Publication number: 20110146537
    Abstract: Disclosed is a compound of the formula or a mixture thereof; wherein R and R? are the same or different, and wherein R and R? are independently selected from an alkyl group, an arylalkyl group, or an alkylaryl group, wherein the alkyl group, the arylalkyl group, or the alkylaryl group has from about 18 to about 60 carbon atoms; and wherein m is an integer of from about 1 to about 30.
    Type: Application
    Filed: December 18, 2009
    Publication date: June 23, 2011
    Applicant: Xerox Corporation
    Inventors: Adela Goredema, Mihaela Maria Birau, C. Geoffrey Allen, Caroline Turek, Maxine E. Haberl, Carol A. Jennings, Peter G. Odell
  • Pigmented Phase Change Inks Containing Low Molecular Weight Pigment Dispersants
    Publication number: 20110151123
    Abstract: An ink comprising an ink vehicle; pigment particles; and a dispersant; wherein the dispersant stabilizes the pigment particles; and wherein the dispersant is a compound of the formula or a mixture thereof, wherein R and R? are independently selected from alkyl, arylalkyl, or alkylaryl with from about 18 to about 60 carbon atoms and wherein m is an integer of from about 1 to about 30.
    Type: Application
    Filed: December 18, 2009
    Publication date: June 23, 2011
    Applicant: Xerox Corporation
    Inventors: Adela Goredema, Mihaela Maria Birau, C. Geoffrey Allen, Caroline Turek, Maxine E. Haberl, Christopher Wagner, Raymond Wan-Ning Wong, Peter G. Odell
  • SOLID INKS INCORPORATING A POLYHYDROXYALKANOATE COMPOUND FOR ENHANCED PROPERTIES
    Publication number: 20110130502
    Abstract: A solid phase change ink composition that includes at least one colorant and an ink vehicle. The ink vehicle further includes at least one polyhydroxyalkanoate compound of the below formula wherein R is independently selected from the group consisting of a hydrogen atom, a hydrocarbon group, a heteroatom, and combinations thereof, and 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: December 2, 2009
    Publication date: June 2, 2011
    Applicant: XEROX CORPORATION
    Inventors: Caroline M. TUREK, Gwynne Evelyn MCANENEY LANNEN, C. Geoffrey ALLEN, Everett Alan NESS
  • Radiation curable ink containing a curable wax
    Patent number: 7934823
    Abstract: Curable monomer that is liquid at 25° C., curable wax and colorant together form a radiation curable ink. This ink may be used to form images by providing the radiation curable ink at a first temperature; applying the radiation curable ink to the substrate to form an image, the substrate being at a second temperature, which is below the first temperature; and exposing the radiation curable ink to radiation to cure the ink.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: May 3, 2011
    Assignee: Xerox Corporation
    Inventors: Jennifer L. Belelie, Peter G. Odell, Christopher A. Wagner, C. Geoffrey Allen
  • TONER HAVING TITANIA AND PROCESSES THEREOF
    Publication number: 20110052882
    Abstract: The present disclosure provides white toner compositions and processes for making same. In embodiments, a desirable white toner may be produced without having to resort to excessive pigment loading, having desirable gloss characteristics.
    Type: Application
    Filed: August 25, 2009
    Publication date: March 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Yi Xin Gong, Daryl W. Vanbesien, Shigang Qiu, Edward Graham Zwartz, Karen Ann Moffat, Richard P.N. Veregin, Cuong Vong, C. Geoffrey Allen
  • Marking material with birefringent nanoparticles
    Patent number: 7897307
    Abstract: Disclosed is a birefringent marking material comprising a vehicle for the marking material and birefringent nanoparticles having an average particle size of less than about 700 nm. The birefringent marking material, such as an ink or a toner, can be used to provide a security marking on or in an item, thereby enabling authentication of the item containing the image formed using the birefringent marking material.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: March 1, 2011
    Assignee: Xerox Corporation
    Inventors: Gabriel Iftime, Peter M. Kazmaier, C. Geoffrey Allen, Paul F. Smith
  • Nonpolar liquid and solid phase change ink compositions comprising nanosized particles of benzimidazolone pigments
    Patent number: 7857901
    Abstract: An ink composition, such as a nonpolar liquid or phase change (solid) ink composition, that includes a non-polar carrier, and a nanoscale pigment particle composition. The nanoscale pigment particle composition includes a benzimidazolone pigment and a sterically bulky stabilizer compound, which is a substituted pyridine derivative, associated non-covalently with the benzimidazolone pigment. The presence of the associated stabilizer limits an extent of particle growth and aggregation, to afford nanoscale pigment particles.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: December 28, 2010
    Assignee: Xerox Corporation
    Inventors: Rina Carlini, C. Geoffrey Allen