Patents by Inventor Louis V. Isganitis

Louis V. Isganitis 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: 7749670
    Abstract: Embodiments include a toner with a fractionated and/or distilled wax having from about 30 to about 64 carbon units, a degree of crystallinity as calculated by heat of melting and as measured by DSC of from about 55 to about 100, a Mw is from about 500 to about 800, and a polydispersity of from about 1 to about 1.05.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: July 6, 2010
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, David J. Sanders, T Hwee Ng, Stephan V. Drappel, Sandra J. Gardner, Sonja Hadzidedic, Louis V. Isganitis, Timothy L. Lincoln, Kevin F. Marcell
  • Patent number: 7691552
    Abstract: A toner having a core with a first latex having a specific glass transition temperature, and further having a shell surrounding the core with a second latex having a specific glass transition temperature, and processes for producing the same.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: April 6, 2010
    Assignee: Xerox Corporation
    Inventors: Vincenzo G. Marcello, Dennis A. Mattison, Jr., Steven A. VanScott, Nancy S. Hunt, Cuong Vong, Vladislav Skorokhod, Richard P. N. Veregin, Michael S. Hawkins, Tie Hwee Ng, Daryl W. Vanbesien, Christine Deborah Anderson, Liam S. Cummings, Louis V. Isganitis, Allan Chen
  • Patent number: 7686939
    Abstract: Embodiments include a fractionated and/or distilled wax having from about 30 to about 64 carbon units, a degree of crystallinity as calculated by heat of melting and as measured by DSC of from about 55 to about 100, a Mw is from about 500 to about 800, and a polydispersity of from about 1 to about 1.05.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: March 30, 2010
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, David J. Sanders, T Hwee Ng, Stephan V. Drappel, Sandra J. Gardner, Sonja Hadzidedic, Louis V. Isganitis, Timothy L. Lincoln, Kevin F. Marcell
  • Patent number: 7662272
    Abstract: Embodiments include a distilled wax having a crystallinity of from about 55 to about 100 percent, wherein the degree of crystallinity is calculated using the following formulas: [Heat of enthalpy (Hm) J/g/294 J/g]×100=degree of crystallinity (Xc); [Heat of recrystallization (Hrc) J/g/294 J/g]×100=degree of crystallinity (Xc); and Sc/(Sc+Sa)]×100%, wherein Sc is a diffraction peak area of a crystalline component of the wax and the Sa is a diffraction peak area of an amorphous component of the wax; and wherein the Mp, Mn and Mw of the wax are all within the range of from about 500 to about 800, and wherein the wax has a polydispersity of from about 1 to about 1.05.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: February 16, 2010
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, David J. Sanders, T Hwee Ng, Stephan V. Drappel, Sandra J. Gardner, Sonja Hadzidedic, Timothy L. Lincoln, Kevin F. Marcell, Louis V. Isganitis
  • Patent number: 7553596
    Abstract: Embodiments include a toner with a distilled wax having a crystallinity of from about 55 to about 100 percent, wherein the degree of crystallinity is calculated using the following formulas: [Heat of enthalpy (Hm) J/g/294 J/g]×100=degree of crystallinity (Xc); [Heat of recrystallization (Hrc) J/g/294 J/g]×100=degree of crystallinity (Xc); and Sc/(Sc+Sa)]×100%, wherein Sc is a diffraction peak area of a crystalline component of the wax and the Sa is a diffraction peak area of an amorphous component of the wax; and wherein the Mp, Mn and Mw of the wax are all within the range of from about 500 to about 800, and wherein the wax has a polydispersity of from about 1 to about 1.05.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: June 30, 2009
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, David J. Sanders, T Hwee Ng, Stephan V. Drappel, Sandra J. Gardner, Sonja Hadzidedic, Louis V. Isganitis, Timothy L. Lincoln, Kevin F. Marcell
  • Patent number: 7507513
    Abstract: Copolymer encapsulated wax particles and their use in forming toner compositions having particles with a desired circularity and size are provided.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: March 24, 2009
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Chieh-Min Cheng, Louis V. Isganitis, Eunhee Lee, Zhen Lai
  • Patent number: 7507517
    Abstract: Continuous processes for producing toner compositions are provided utilizing spinning disc reactors, rotating tubular reactors, or combinations thereof.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: March 24, 2009
    Assignee: Xerox Corporation
    Inventors: Christopher M. Wolfe, Mark A. Jackson, Chieh-Min Cheng, Emily L. Moore, Louis V. Isganitis
  • Publication number: 20080044754
    Abstract: A toner having a core with a first latex having a specific glass transition temperature, and further having a shell surrounding the core with a second latex having a specific glass transition temperature, and processes for producing the same.
    Type: Application
    Filed: August 15, 2006
    Publication date: February 21, 2008
    Inventors: Vincenzo G. Marcello, Dennis A. Mattison, Steven A. VanScott, Nancy S. Hunt, Cuong Vong, Vladislav Skorokhod, Richard P.N. Veregin, Michael S. Hawkins, Tie Hwee Ng, Daryl W. Vanbesien, Christine Deborah Anderson, Liam S. Cummings, Louis V. Isganitis, Allan Chen
  • Patent number: 7229735
    Abstract: A toner composition for use in a xerographic or electrostatographic imaging process. The toner composition includes a toner particle and an optional primary external surface additive and a friable external surface additive. The friable external surface additive may also be a material that is capable of functioning as a primary external surface additive. The friable external surface additive is generally larger than the primary surface additive and capable of having portions of the friable particle broken or abraded off during the imaging process. The particles that are abraded off the friable additive can replace the primary external additive particles that become embedded into toner particles during the development process. The friable additives contribute to reducing toner aging and provide a toner with satisfactory flow and triboelectric properties.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: June 12, 2007
    Assignee: Xerox Corporation
    Inventors: Thomas R. Pickering, Louis V. Isganitis
  • Patent number: 6042640
    Abstract: Disclosed is a process which comprises contacting a sulfur-containing solvent with an oxidizing agent, said sulfur-containing solvent containing odor-causing impurities, thereby reducing odor. Another embodiment of the present invention is directed to a process for preparing an ink composition which comprises: (a) contacting a sulfur-containing solvent with an oxidizing agent, said sulfur-containing solvent containing odor-causing impurities, thereby reducing odor; and (b) admixing the sulfur-containing solvent with water and a colorant, thereby forming an ink composition.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: March 28, 2000
    Assignee: Xerox Corporation
    Inventors: Louis V. Isganitis, Thomas W. Smith
  • Patent number: 5925177
    Abstract: Disclosed is an ink composition which comprises (a) water; (b) Acid Yellow 23 dye; and (c) urea.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: July 20, 1999
    Assignee: Xerox Corporation
    Inventors: Leonard M. Carreira, Kathy-Jo Brodsky, Mary Anne Evans, Anne L. Wickett, Christine C. Lyons, Louis V. Isganitis
  • Patent number: 5683520
    Abstract: Several methods are provided for cleaning felt or foam materials that are used to store and deliver ink, particularly ink supplied to ink jet printheads in an ink jet printing system. The felt materials are contaminated during manufacture, by various antistats, primarily phosphates. These antistats later react with the ink to create kogation and nozzle blocking problems as well as reduction of surface tension of the ink. The methods of the invention are directed to reducing the antistats left in the storage material after manufacture. In one method, the material is washed in heated softened water. Prior to loading the material in the wash, IPA is added to the heated wash. The material is washed through two Wash/Rinse cycles and then dried. The removal of the calcium in the wash water via softening prevents the precipitation of calcium-phosphate salts, which, when the material later contacts the ink, reduces nozzle clogging caused by these precipitates.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: November 4, 1997
    Assignee: Xerox Corporation
    Inventors: Norman S. Edgett, Gary R. Fague, Louis V. Isganitis, Kurt B. Gundlach, Joseph R. Weber
  • Patent number: 5563644
    Abstract: Disclosed is a printing process which comprises applying in imagewise fashion to a substrate an ink composition which comprises an aqueous liquid vehicle, a colorant, and a drying component selected from the group consisting of zwitterionic compounds, and subsequently exposing the substrate to microwave radiation, thereby drying the images on the substrate. In a preferred embodiment, the invention is directed to a thermal ink jet printing process which comprises (1) incorporating into a thermal ink jet printing apparatus an ink composition which comprises an aqueous liquid vehicle, a colorant, and a drying component selected from the group consisting of zwitterionic compounds; (2) heating the ink in an imagewise pattern to cause bubbles to form therein, thereby causing droplets of the ink to be ejected in an imagewise pattern onto a substrate, thereby generating images on the substrate; and (3) exposing the substrate to microwave radiation, thereby drying the images on the substrate.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: October 8, 1996
    Assignee: Xerox Corporation
    Inventors: Louis V. Isganitis, Edward J. Radigan, Arthur M. Gooray, Leonard M. Carreira, William M. Schwarz
  • Patent number: 5360472
    Abstract: Disclosed are dye compositions of the formula ##STR1## wherein Cp and Cp' are each coupler compounds of the formula ##STR2## wherein the --COOH group and the --OH group can be in any position on either ring, provided that in the naphthalene ring system there is present least one hydrogen activated through resonance by the --OH group for an electrophilic aromatic substitution coupling reaction, n represents the number of substituents on the rings and is a number of from 0 to 8, and R represents the substituent groups on the ring, wherein each R is independently selected from the group consisting of hydroxyl groups, alkyl groups, substituted alkyl groups, aryl groups, substituted aryl groups, aryl-alkyl groups, substituted aryl-alkyl groups, halogen atoms, and nitro groups. Also disclosed are aqueous ink compositions containing the dyes, processes for making the dyes, processes for making the inks containing the dyes, and printing processes employing the inks.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: November 1, 1994
    Assignee: Xerox Corporation
    Inventors: Edward J. Radigan, Jr., Louis V. Isganitis, Warren E. Solodar, Kurt B. Gundlach
  • Patent number: 5220346
    Abstract: Disclosed is a printing process which comprises applying in imagewise fashion to a substrate an ink composition which comprises an aqueous liquid vehicle, a colorant, and an ionic compound at least partially ionizable in the liquid vehicle, said ink composition having a conductivity of at least about 10 milliSiemens per centimeter, and subsequently exposing the substrate to microwave radiation, thereby drying the images on the substrate.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: June 15, 1993
    Assignee: Xerox Corporation
    Inventors: Leonard M. Carreira, Arthur M. Gooray, Kenneth C. Peter, Louis V. Isganitis, Edward J. Radigan
  • Patent number: 4886729
    Abstract: A positively charged liquid developer composition comprised of polymer particles, a hydrocarbon liquid component, a charge director comprised of lecithin, and as pigment particles the beta crystalline form of copper phthalocyanine.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: December 12, 1989
    Assignee: Xerox Corporation
    Inventors: Bernard Grushkin, David E. Hutka, Louis V. Isganitis, Edward J. Radigan
  • Patent number: 4539284
    Abstract: An improved infrared sensitive flash fusible colored toner composition comprised of (1) resin particles, (2) pigment particles selected from the group consisting of cyan, magenta, yellow, blue, red and green, and (3) additives selected from the group consisting of vanadyl phthalocyanines, naphthalocyanines, and the quaternary ammonium salts selected from the group consisting of 1,1',3,3,3',3 hexylmethyl-4,4',5,5'-dibenzo-2,2'-indotricarbocyanine perchlorate, 5,5'-dichloro-11-diphenylamine-3,3'-diethyl-10,12-ethylenethiatricarbocyan ine perchlorate, 1,1',3,3,3',3'-hexamethylindotricarbocyanine perchlorate, and 3,3'-di(3-acetoxypropyl)-11-diphenylamine-10,12-ethylene-5,6,5',6'-dibenzo thiatricarbocyanine perchlorate.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: September 3, 1985
    Assignee: Xerox Corporation
    Inventors: Angello J. Barbetta, Robert J. Gruber, Louis V. Isganitis, Kock-Yee Law, John W. Lin, Ronald J. Koch, Steven T. Dunn