Patents Represented by Attorney E. O. Palazzo

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  • Photoconductive imaging members
    Patent number: 7001700
    Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide; and a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain at least two phenolic groups.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: February 21, 2006
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Liang-Bih Lin, Jennifer Y. Hwang
  • Toner processes
    Patent number: 7001702
    Abstract: A toner containing a mixture of a semicrystalline polymer, an amorphous polymer and a crystalline polyolefin; and a colorant.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: February 21, 2006
    Assignee: Xerox Corporation
    Inventors: Chieh-Min Cheng, Pinyen Lin
  • Polythiophenes and devices thereof
    Patent number: 6992167
    Abstract: Polythiophenes of the formula wherein R and R? are side chains; A is a divalent linkage; x and y represent the number of unsubstituted thienylene units; z represents the number of groups, and wherein the sum of x and y represents the number of groups; m represents the number of segments; and n represents the degree of polymerization.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: January 31, 2006
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, Lu Jiang, Yiliang Wu, Dasarao K. Murti
  • Toner processes
    Patent number: 6984480
    Abstract: A process comprising heating a mixture of colorant and latex in the presence of a coagulant and a silicate salt, and wherein said heating comprises a first heating equal to or below about the glass transition temperature of a polymer contained in said latex, and a second heating equal to or about the glass transition temperature of a polymer contained in said latex; wherein said first heating enables the formation of aggregates and said second heating enables the fusion of said colorant and said polymer; and optionally wherein said silicate is contained in an alkali metal hydroxide.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: January 10, 2006
    Assignee: Xerox Corporation
    Inventors: Daryl Vanbesien, Michael A. Hopper, Raj D. Patel
  • Photoconductive imaging members
    Patent number: 6946226
    Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of particles chemically attached on the surface of an electron transport component.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: September 20, 2005
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Yuhua Tong, Liang-Bih Lin, Nan-Xing Hu, Linda L. Ferrarese, James M. Duff, Yu Qi
  • Photoconductive members
    Patent number: 6919154
    Abstract: A photoconductive imaging member containing a supporting substrate, a photogenerating layer, a charge transport layer, and in contact with the charge transport layer comprised of a polymer and a yellow dye of the formula
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: July 19, 2005
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Satchidanand Mishra, John F. Yanus, Anthony M. Horgan, Geoffrey M. T. Foley, Huoy-Jen Yuh, Dale S. Renfer, Yuhua Tong, Kenny-Tuan T. Dinh, Markus R. Silvestri, John F. Graham
  • Photoconductive imaging members
    Patent number: 6913863
    Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide; and a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain at least two phenolic groups.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: July 5, 2005
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Liang-Bih Lin, Jennifer Y. Hwang
  • Toner processes
    Patent number: 6890696
    Abstract: A toner process comprising heating a mixture of a latex and a colorant, which heating is accomplished below about the glass transition temperature, Tg, of polymer contained in the latex; cooling; and subsequently adding a methacrylate polymer solution; adjusting the pH of the mixture resulting to permit the methacrylate polymer to precipitate on said mixture of latex and said colorant; and wherein resulting product is heated above about the glass transition temperature, Tg, of said latex polymer.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: May 10, 2005
    Assignee: Xerox Corporation
    Inventors: Valerie M. Farrugia, Michael S. Hawkins
  • Photoconductive imaging members
    Patent number: 6864026
    Abstract: A photoconductive imaging member comprised of an optional supporting substrate, an optional blocking layer, a photogenerating layer, and a charge transport layer, and wherein said charge transport layer comprises a crosslinked polycarbonate component containing a repeating segment of the formula wherein R1 is selected from the group consisting of hydrogen, alkyl with from about 1 to about 15 carbons optionally further containing one or more heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur, silicon, and phosphorus, or aryl; R2 represents a divalent linkage; Ar3 and Ar4 each independently represent aromatic groups; R3 and R4 are independently selected from the group consisting of hydrogen, alkyl, and aryl; and optionally wherein R3 and R4 form a combined ring structure; and wherein x and y represent the mole fractions of the repeating segments.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: March 8, 2005
    Assignee: Xerox Corporation
    Inventors: Yu Qi, Nan-Xing Hu, H. Bruce Goodbrand, Paul F. Smith, C. Geoffrey Allen
  • Fluorinated polythiophenes and devices thereof
    Patent number: 6855951
    Abstract: An electronic device containing a polythiophene wherein R is an alkyl alkoxy; x represents the number of R groups; R? is CF3, alkoxy, alkyl, or optionally alkylene; y and z represent the number of segments; and a and b represent the mole fractions of each moiety, respectively, wherein the sum of a+b is equal to about 1.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: February 15, 2005
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, Lu Jiang, Yiliang Wu, Ping Liu
  • Toner processes
    Patent number: 6841329
    Abstract: A toner process comprising mixing a colorant dispersion with a latex, a wax dispersion, and a coagulant, and wherein the polymer present in the latex possesses a gel content of from about 0.5 to about 4.5 weight percent, a polymer melt flow index (MFI) of from about 20 to about 45 grams/10 minutes at about from about 115° C. to about 145° C., the crosslinking molecular weight Mc of the polymer being from about 12,000 to about 200,000, and the crosslinking density Me of the polymer being from about 1.2×10?9 to about 2×10?7/Kmole.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: January 11, 2005
    Assignee: Xerox Corporation
    Inventors: Peter V. Nguyen, Amy A. Albright, Donald Riley, Chieh-Min Cheng
  • Wax dispersions and process thereof
    Patent number: 6835768
    Abstract: A dispersion comprised of a wax and a hydrophilic polyester stabilizer.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: December 28, 2004
    Assignee: Xerox Corporation
    Inventors: Enno E. Agur, Guerino G. Sacripante, Fatima M. Mayer
  • Toner
    Patent number: 6824944
    Abstract: A toner process involving, for example, contacting a toner surface with a reducing agent and a metal halide.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: November 30, 2004
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Valerie M. Farrugia, Michael S. Hawkins
  • Photoconductive imaging members
    Patent number: 6824940
    Abstract: A photoconductive imaging member containing a hole blocking layer, a photogenerating layer, a charge transport layer, and thereover an overcoat layer comprised of a polymer with a low dielectric constant and charge transport molecules.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: November 30, 2004
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Markus R. Silvestri, Liang-Bih Lin, Cindy C. Chen
  • Photoconductive imaging members
    Patent number: 6818366
    Abstract: A photoconductive imaging member comprised of an optional supporting substrate, an optional blocking layer, a photogenerating layer, and a charge transport layer, and a SiO3 containing polycarbonate component.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: November 16, 2004
    Assignee: Xerox Corporation
    Inventors: Yu Qi, Nan-Xing Hu, H. Bruce Goodbrand, Paul F. Smith, C. Geoffrey Allen
  • Toner processes
    Patent number: 6780560
    Abstract: A process involving, for example, the admixing of an emulsion latex, a colorant, and a tetra-alkylated quaternary ammonium halide salt complexing agent; and thereafter, heating in sequence about below the Tg of a resin contained in the latex and then heating about above the Tg glass transition temperature of a resin contained in the latex.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: August 24, 2004
    Assignee: Xerox Corporation
    Inventors: Valerie M. Farrugia, Guerino G. Sacripante
  • Toner processes
    Patent number: 6780559
    Abstract: A toner process involving mixing a colorant dispersion and a metal oxide with a latex emulsion comprised of polymer, water, and an anionic surfactant, adding a cationic coagulant followed by heating the mixture to a temperature below about the glass transition temperature (Tg) of the latex polymer particles to provide toner size aggregates comprised of polymer pigment and dye, heating above about the Tg of the polymer and isolating the resulting product.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: August 24, 2004
    Assignee: Xerox Corporation
    Inventors: Richard P. N. Veregin, Raj D. Patel, Maria N. V. McDougall
  • Polythiophenes and devices thereof
    Patent number: 6777529
    Abstract: Polythiophenes of the formula wherein R and R′ are side chains; A is a divalent linkage; x and y represent the number of unsubstituted thienylene units; z is 0 or 1, and wherein the sum of x and y is greater than zero; m represents the number of segments; and n represents the degree of polymerization.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: August 17, 2004
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, Lu Jiang, Yiliang Wu, Dasarao K. Murti
  • Toner processes
    Patent number: 6767684
    Abstract: A toner process involving mixing a colorant dispersion comprising an acicular magnetite dispersion and a colorant dispersion with a latex, a wax dispersion, a crosslinked resin, and a coagulant.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: July 27, 2004
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Michael A. Hopper, Edward G. Zwartz, Allan K. Chen
  • Electroluminescent devices containing thermal protective layers
    Patent number: 6765348
    Abstract: The disclosure provided relates to an organic light emitting device containing a substrate; a first electrode; a light emitting region comprising an organic luminescent material; a second electrode, and a protective thermal layer or thermal layers, and which layer is contained on the first electrode, the second electrode, the first and second electrode, and/or is contained on other layers in the device.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: July 20, 2004
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Zoran D. Popovic, Nan-Xing Hu