Patents by Inventor Markus R. Silvestri

Markus R. Silvestri 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: 7049038
    Abstract: A photoconductive imaging member comprised of an optional supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a pyrolyzed polyacrylonitrile.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: May 23, 2006
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Helen R. Cherniack, Damodar M. Pai, Markus R. Silvestri, John F. Yanus, Yuhua Tong, Dale S. Renfer, Kenny-Tuan T. Dinh, Merlin E. Scharfe, Steven M. Sterling
  • Patent number: 7045262
    Abstract: A photoconductive imaging member comprised of a photogenerating layer and a charge transport layer, and wherein the charge transport layer contains a polymeric solid acid.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: May 16, 2006
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Satchidanand Mishra, Anthony M. Horgan, John F. Yanus, Dale S. Renfer, Robert C. U. Yu, Markus R. Silvestri, Cindy C. Chen, Lanhui Zhang
  • Patent number: 7026083
    Abstract: An imaging member having a substrate, a charge transport layer having charge transport materials dispersed therein, and an overcoat layer comprising trisamino triphenyl compound.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: April 11, 2006
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Kenny-Tuan T. Dinh, John F. Yanus, Yuhua Tong, Markus R. Silvestri, Dale S. Renfer
  • Patent number: 7022445
    Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer is coated in two passes and wherein the second pass comprises the application of a charge transport component and a hindered phenol covalently bonded to a polymer. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: April 4, 2006
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
  • Patent number: 7008741
    Abstract: A photoconductive imaging member containing a photogenerating layer, a charge transport layer, or a plurality of charge transport layers, and which charge transport, especially the top charge transport layer contains a vinyl containing organic compound.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: March 7, 2006
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Yuhua Tong, Edward F. Grabowski, Kathleen M. Carmichael, Markus R. Silvestri
  • 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
  • Patent number: 6906125
    Abstract: A composition having a trisamino triphenyl compound and a layer composition having a trisamino triphenyl compound and a polyamide.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: June 14, 2005
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Kenny-Tuan T. Dinh, John F. Yanus, Yuhua Tong, Markus R. Silvestri, Dale S. Renfer
  • Patent number: 6875548
    Abstract: A photoconductive imaging member including an optional supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said layer includes a charge transport component and a polysiloxane.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: April 5, 2005
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, John F. Yanus, Dale S. Renfer, Markus R. Silvestri, Cindy C. Chen, Dennis J. Prosser, Susan M. VanDusen, Lanhui Zhang, Sean X. Pan
  • Patent number: 6835515
    Abstract: A composition is provided for coating a photoreceptor having a charge generating layer and a charge transport layer. The composition includes a hole transport material, a cross-linkable film forming binder having at least one functional group that is reactive with isocyanate, a blocked isocyanate cross-linking agent and a solvent having a boiling point equal to or below the deblocking temperature. The blocked isocyanate cross-linking agent is the reaction product of an isocyanate and a blocking agent, wherein the blocking agent has a boiling point temperature equal to or below a selected deblocking temperature to allow the isocyanate to form cross-links. The invention also provides an electrophotographic imaging member with an overcoat layer comprising a cross-linked film forming binder, an isocyanate compound, a hole transport material, and optionally a surface energy reducing agent. Processes for making the imaging members are also provided.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: December 28, 2004
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, John F. Yanus, William W. Limburg, Timothy J. Fuller, Dale S. Renfer, Markus R. Silvestri
  • 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
  • Publication number: 20040224244
    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: Application
    Filed: May 5, 2003
    Publication date: November 11, 2004
    Applicant: 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
  • Publication number: 20040214100
    Abstract: A photoconductive imaging member containing a photogenerating layer, a charge transport layer, or a plurality of charge transport layers, and which charge transport, especially the top charge transport layer contains a vinyl containing organic compound.
    Type: Application
    Filed: April 24, 2003
    Publication date: October 28, 2004
    Applicant: Xerox Corporation
    Inventors: Robert C.U. Yu, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Yuhua Tong, Edward F. Grabowski, Kathleen M. Carmichael, Markus R. Silvestri
  • Publication number: 20040175637
    Abstract: A photoconductive imaging member including an optional supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said layer includes a charge transport component and a polysiloxane.
    Type: Application
    Filed: February 19, 2003
    Publication date: September 9, 2004
    Applicant: Xerox Corportion
    Inventors: Yuhua Tong, Timothy J. Fuller, John F. Yanus, Dale S. Renfer, Markus R. Silvestri, Cindy C. Chen, Dennis J. Prosser, Susan M. VanDusen, Lanhui Zhang, Sean X. Pan
  • Publication number: 20040166427
    Abstract: A composition is provided for coating a photoreceptor having a charge generating layer and a charge transport layer. The composition includes a hole transport material, a cross-linkable film forming binder having at least one functional group that is reactive with isocyanate, a blocked isocyanate cross-linking agent and a solvent having a boiling point equal to or below the deblocking temperature. The blocked isocyanate cross-linking agent is the reaction product of an isocyanate and a blocking agent, wherein the blocking agent has a boiling point temperature equal to or below a selected deblocking temperature to allow the isocyanate to form cross-links. The invention also provides an electrophotographic imaging member with an overcoat layer comprising a cross-linked film forming binder, an isocyanate compound, a hole transport material, and optionally a surface energy reducing agent. Processes for making the imaging members are also provided.
    Type: Application
    Filed: February 21, 2003
    Publication date: August 26, 2004
    Applicant: Xerox Corporation
    Inventors: Yuhua Tong, John F. Yanus, William W. Limburg, Timothy J. Fuller, Dale S. Renfer, Markus R. Silvestri
  • Publication number: 20040161682
    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: Application
    Filed: February 19, 2003
    Publication date: August 19, 2004
    Applicant: Xerox Corporation
    Inventors: Jin Wu, Markus R. Silvestri, Liang-Bih Lin, Cindy C. Chen
  • Publication number: 20040151999
    Abstract: An imaging member having a charge transport layer with multiple regions or layers is provided. The charge transport layer includes at least two charge transport layers coated from solutions of different components and concentrations, wherein the second (top) transport layer comprises a lower concentration of different charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the second (top) charge transport layer is a high mobility hole transport compound. The charge transport compound in each layer is dissolved or molecularly dispersed in an electrically inactive film forming polymer to form a solid solution. In such a construction, the resulting dual charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.
    Type: Application
    Filed: December 12, 2003
    Publication date: August 5, 2004
    Applicant: Xerox Corporation
    Inventors: Satchidanand Mishra, Houy Jen Yuh, Anthony M. Horgan, Markus R. Silvestri, Robert C.U. Yu, Yuhua Tong, Dale Renfer, Kenny-Tuan Dinh, Geoff Foley, Jack Yanus, Timothy Fuller
  • Patent number: 6761978
    Abstract: An adhesive having polyamide and an electrically conductive filler dispersed or contained therein, for use in bonding components of electrostatographic, contact electrostatic, digital and other like printing machines.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: July 13, 2004
    Assignee: Xerox Corporation
    Inventors: Ralph A. Mosher, T. Edwin Freeman, Theodore Lovallo, Damodar M. Pai, John F. Yanus, Timothy J. Fuller, Markus R. Silvestri, Gerald M. Fletcher, Antonio DeCrescentis, Ihor W. Tarnawskyj
  • Publication number: 20040115546
    Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer is coated in two passes and wherein the second pass comprises the application of a charge transport component and a hindered phenol covalently bonded to a polymer. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
  • Publication number: 20040063829
    Abstract: A composition having a trisamino triphenyl compound and a layer composition having a trisamino triphenyl compound and a polyamide.
    Type: Application
    Filed: September 30, 2002
    Publication date: April 1, 2004
    Applicant: Xerox Corporation
    Inventors: Timothy J. Fuller, Kenny-Tuan T. Dinh, John F. Yanus, Yuhua Tong, Markus R. Silvestri, Dale S. Renfer
  • Publication number: 20040063016
    Abstract: An imaging member having a substrate, a charge transport layer having charge transport materials dispersed therein, and an overcoat layer comprising trisamino triphenyl compound.
    Type: Application
    Filed: September 30, 2002
    Publication date: April 1, 2004
    Applicant: Xerox Corporation.
    Inventors: Timothy J. Fuller, Kenny-Tuan T. Dinh, John F. Yanus, Yuhua Tong, Markus R. Silvestri, Dales S. Renfer