Patents by Inventor Robert W. Hedrick

Robert W. Hedrick 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).

  • EPOXY CARBOXYL RESIN MIXTURE HOLE BLOCKING LAYER PHOTOCONDUCTORS
    Publication number: 20100221651
    Abstract: A photoconductor that includes, for example, a substrate; an undercoat layer thereover wherein the undercoat layer contains a metal oxide, and a mixture of an epoxy resin and a carboxyl resin; a photogenerating layer; and at least one charge transport layer.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 2, 2010
    Applicant: Xerox Corporation
    Inventors: Jin Wu, Marc J. Livecchi, Robert W. Hedrick, John J. Wilbert
  • Phosphoric acid ester containing photoconductors
    Patent number: 7670735
    Abstract: A photoconductor containing a substrate, a layer thereover wherein the layer comprises, for example, a polyol resin, an aminoplast resin, an ester of phosphoric acid adhesion component, and a metal oxide; and at least one imaging layer of, for example, a photogenerating layer and a charge transport layer formed on the polyol resin containing layer.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: March 2, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Daniel V. Levy, Robert W. Hedrick, Liang-Bih Lin
  • BINDERLESS OVERCOAT LAYER
    Publication number: 20100015540
    Abstract: Embodiments pertain to a novel imaging member, namely, an imaging member or photoreceptor comprising a binderless overcoat layer which exhibits substantially improved electrical performance, such as low residual potential and good electrical cyclic stability. The overcoat layer of the present embodiments is formed from a formulation comprising a small transport molecule, a crosslinking agent, an acid catalyst and a solvent.
    Type: Application
    Filed: September 25, 2009
    Publication date: January 21, 2010
    Applicant: XEROX CORPORATION
    Inventors: Kenny-tuan T. Dinh, Edward C. Savage, Marc J. LiVecchi, Robert W. Hedrick, Linda L. Ferrarese, Sherri A. Toates, Stacy J. Kowsz
  • METAL OXIDE OVERCOATED PHOTOCONDUCTORS
    Publication number: 20090246665
    Abstract: A photoconductor containing a photogenerating layer, and at least one charge transport layer, and a top polymeric overcoat layer in contact with, and contiguous to the charge transport layer, and which overcoat layer includes an indium tin oxide.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 1, 2009
    Applicant: Xerox Corporation
    Inventors: Jin Wu, Kenny-Tuan Dinh, John F. Yanus, Adal Tecleab, June Shujun Peng, Marc J. Livecchi, Linda L. Ferrarese, Edward C. Savage, Gary A. Batt, John J. Wilbert, Robert W. Hedrick
  • Imaging member
    Publication number: 20090053635
    Abstract: The presently disclosed embodiments are directed to charge transport layers useful in electrostatography. More particularly, the embodiments pertain to an improved electrostatographic imaging member having a charge transport layer that is dual-dopant, wherein operating life improvement is achieved by incorporating a small amount of compatible thermalsetting resin and polyhedral oligomeric silsesquioxane into the layer. Incorporation of these resins have been shown to increase charge transport life.
    Type: Application
    Filed: August 21, 2007
    Publication date: February 26, 2009
    Applicant: Xerox Corporation
    Inventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Robert W. Hedrick, Gary A. Batt, M. John Hinckel
  • Imaging member
    Publication number: 20090053637
    Abstract: The presently disclosed embodiments are directed to charge transport layers useful in electrostatography. More particularly, the embodiments pertain to an improved electrostatographic imaging member having a charge transport layer that is partially crosslinked, wherein the crosslinking is achieved by incorporating a small amount of compatible thermalsetting resins into the layer. Incorporation of these resins have been shown to increase charge transport life.
    Type: Application
    Filed: August 21, 2007
    Publication date: February 26, 2009
    Applicant: Xerox Corporation
    Inventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Robert W. Hedrick, Linda Ferrarese
  • Phosphoric acid ester containing photoconductors
    Publication number: 20080032217
    Abstract: A photoconductor containing a substrate, a layer thereover wherein the layer comprises, for example, a polyol resin, an aminoplast resin, an ester of phosphoric acid adhesion component, and a metal oxide; and at least one imaging layer of, for example, a photogenerating layer and a charge transport layer formed on the polyol resin containing layer.
    Type: Application
    Filed: August 1, 2006
    Publication date: February 7, 2008
    Inventors: Jin Wu, Daniel V. Levy, Robert W. Hedrick, Liang-Bih Lin
  • Chuck apparatus for substrate shaping
    Patent number: 5895529
    Abstract: There is disclosed a chuck apparatus for holding and shaping a hollow, flexible, endless substrate during dip coating comprising: (a) a hollow, flexible bladder adapted to be disposed within the substrate; and (b) a first spindle and a second spindle which are partially disposed within the bladder, the second spindle being movable to press the bladder against the substrate and to shape the bladder and the substrate into an elongated shape.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: April 20, 1999
    Assignee: Xerox Corporation
    Inventors: Geoffrey M. T. Foley, Robert W. Hedrick, Henry T. Mastalski, Ernest F. Matyi, Yonn K. Rasmussen, Mark S. Thomas, Huoy-Jen Yuh, William G. Herbert, Gary J. Maier
  • Multiple dip coating method
    Patent number: 5633046
    Abstract: There is disclosed a dip coating method for fabricating a photosensitive member comprising: (a) dipping a substrate into a coating solution comprised of a photosensitive material and raising the substrate, thereby depositing a coating of the photosensitive material on the substrate; and (b) dipping the substrate in the same coating solution and raising the substrate, thereby increasing the thickness of the coating.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: May 27, 1997
    Assignee: Xerox Corporation
    Inventors: Mark C. Petropoulos, Geoffrey M. T. Foley, Robert W. Hedrick, Richard H. Nealey
  • Airfoil air ring
    Patent number: 5514421
    Abstract: An apparatus for applying a coating solution to at least a portion of a substrate surface to form a coated surface comprises an arrangement for separating the substrate from the coating solution and an arrangement for creating a flow of gas onto the coated surface in a direction substantially parallel to the coated surface substantially in unison with the separating arrangement separating the substrate from the coating solution.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: May 7, 1996
    Assignee: Xerox Corporation
    Inventors: Stanley J. Pietrzykowski, Edward C. Williams, Robert W. Hedrick, William H. Gilbert, deceased
  • Photoreceptor with low surface energy overcoat
    Patent number: 5436099
    Abstract: An electrophotographic imaging member including a substrate, a charge generating layer, a charge transport layer, and an overcoat layer comprising a hole transporting hydroxy arylamine compound having at least two hydroxy functional groups, hydroxy terminated diorgano siloxane and a polyamide film forming binder capable of forming hydrogen bonds with the hydroxy functional groups of the hydroxy arylamine compound and the hydroxy terminated diorgano siloxane.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: July 25, 1995
    Assignee: Xerox Corporation
    Inventors: Richard L. Schank, James R. Esser, Robert W. Hedrick