Patents by Inventor Kent J. Evans

Kent J. Evans 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).

  • Publication number: 20110104603
    Abstract: The disclosed embodiments are directed to processes for removing photoreceptor coatings from a substrate, wherein the photoreceptor coatings disposed over a substrate of an electrophotographic photoreceptor. More specifically, the present embodiments discloses a photoreceptor coatings removal process comprises subjecting an electrophotographic photoreceptor to a stripping solution that separates the coatings from the substrate.
    Type: Application
    Filed: November 5, 2009
    Publication date: May 5, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Kent J. Evans, Yuhua Tong, Nancy L. Belknap, Helen R. Cherniack, Robert P. Altavela, Edward F. Grabowski
  • Publication number: 20110104602
    Abstract: The disclosed embodiments are directed to a method for removing photoreceptor coatings from a rigid substrate, wherein the photoreceptor coatings disposed over a substrate of an electrophotographic photoreceptor, in order to recover it for re-use in photoreceptor manufacturing. More specifically, the invention discloses a photoreceptor substrate recovery methodology that includes the creation of an inner release layer over the substrate and followed by subjecting the rejected or used electrophotographic photoreceptor to a step of soaking in a non-toxic and environmentally-friendly stripping solution that separates the coatings from the substrate.
    Type: Application
    Filed: November 5, 2009
    Publication date: May 5, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Kent J. Evans, Yuhua Tong, Nancy L. Belknap, Helen R. Cherniack, Robert P. Altavela, Edward F. Grabowski
  • Patent number: 7923185
    Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the charge transport layer contains a pyrazine.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: April 12, 2011
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Terry L Street, Terry L Bluhm, Kent J Evans, Edward F Grabowski, Susan M Vandusen, Min-Hong Fu, Kathleen M Carmichael
  • Patent number: 7914960
    Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and where the charge transport layer contains at least one of an ammonium salt.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: March 29, 2011
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Edward F Grabowski, Kent J Evans, Andronique Ioannidis
  • Patent number: 7901856
    Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and where the photogenerating layer contains an ammonium salt, an imidazolium salt, or mixtures thereof.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: March 8, 2011
    Assignee: XEROX Corporation
    Inventors: Jin Wu, Edward F Grabowski, Kent J Evans, Sherri A Colon, Dale S Renfer
  • Patent number: 7862967
    Abstract: A photoconductor that includes a supporting substrate, a first photogenerating layer, a second photogenerating layer and at least one charge transport layer. The first photogenerating layer contains, for example, a phthalocyanine pigment, and the second photogenerating layer contains a different phthalocyanine pigment than the first photogenerating layer phthalocyanine.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: January 4, 2011
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Markus R. Silvestri, Kent J. Evans, Daniel V. Levy, Michael A. Morgan, M. John Hinckel, Liang-Bih Lin
  • Publication number: 20100323288
    Abstract: The disclosed embodiments are directed to an electrophotographic photoreceptor having a release layer. More particularly, the disclosure relates to an electrophotographic photoreceptor having a release layer which comprises an organosilane compound coated over the substrate surface. Other embodiments include methods for coating layer removal using a specifically configured electrophotographic photoreceptor having a release layer and methods for recovering a charge transport molecule.
    Type: Application
    Filed: June 17, 2009
    Publication date: December 23, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert P. Altavela, Yuhua Tong, Edward F. Grabowski, Kent J. Evans, Adilson Ramos, Nancy Belknap, Helen R. Cherniack
  • Patent number: 7855039
    Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and an overcoat, and where the overcoat contains at least one of ketal. In embodiments the overcoat layer may include ?-hydroxyketone, ?-diketone, or mixtures thereof.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: December 21, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, John F. Yanus, Kenny-Tuan Dinh, Kent J Evans
  • Patent number: 7838186
    Abstract: A photoconductor that includes an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the charge transport layer contains a phenolic chelating additive.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: November 23, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Kent J Evans, Sherri A. Colon, Dale S. Renfer
  • Patent number: 7799140
    Abstract: The disclosed embodiments are directed to processes for removing photoreceptor coatings from a substrate, wherein the photoreceptor coatings disposed over a substrate of an electrophotographic photoreceptor. More specifically, the invention discloses a photoreceptor coatings removal process comprises subjecting an electrophotographic photoreceptor to a stripping solution that separates the coatings from the substrate.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: September 21, 2010
    Assignee: Xerox Corporation
    Inventors: Robert P. Altavela, Yuhua Tong, Edward F. Grabowski, Kent J. Evans, Adilson Ramos, Nancy Belknap, Helen R. Cherniack
  • Publication number: 20100221649
    Abstract: A photoconductor that includes a supporting substrate, a ground plane layer, a hole blocking layer, a photogenerating layer, and at least one charge transport layer, and where the hole blocking layer includes a boron containing compound.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 2, 2010
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, Dennis J. Prosser, Kathleen M. Carmichael, Sherri A. Toates, Kent J. Evans, Edward F. Grabowski
  • Patent number: 7785759
    Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer containing at least one charge transport component, and wherein the charge transport layer also contains a thiadiazole.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: August 31, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Terry L Street, Terry L Bluhm, Kent J Evans, Edward F Grabowski, Susan M Vandusen, Min-Hong Fu, Kathleen M Carmichael
  • Publication number: 20100129743
    Abstract: The presently disclosed embodiments are directed to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the present embodiments provide a robust undercoat layer comprising TiSi in which the TiO2 to SiO2 ratio falls in a particular ratio range discovered to reduce both plywood print defects as well as abnormal operating parameters and print defects from micro-cracks in the undercoat layer, and methods for making the same.
    Type: Application
    Filed: November 24, 2008
    Publication date: May 27, 2010
    Applicant: XEROX CORPORATION
    Inventors: Lanhui Zhang, Richardson H. Kilis, Ma Lin, Mark S. Thomas, Kent J. Evans, Adilson P. Ramos
  • Patent number: 7718336
    Abstract: A photoconductor containing a supporting substrate, a photogenerating layer; and at least one charge transport layer where the photogenerating layer contains a photogenerating pigment and a chelating additive or agent of, for example, a ?-diketone, a ketoester, a hydroxyl carboxylic acid, a hydroxyl carboxylic acid ester, a keto alcohol, or an amino alcohol.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: May 18, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Kent J. Evans, Dennis J. Prosser, Liang-Bih Lin, Raymond K. Crandall
  • Publication number: 20100119963
    Abstract: The presently disclosed embodiments relate in general to electrophotographic imaging members, such as layered photoreceptor structures, and processes for making and using the same. More particularly, the embodiments pertain to an improved photoreceptor that exhibits little to no response to injected charges and demonstrates excellent ghosting properties.
    Type: Application
    Filed: November 12, 2008
    Publication date: May 13, 2010
    Applicant: XEROX CORPORATION
    Inventors: Markus R. Silvestri, Jin Wu, M. John Hinckel, David M. Skinner, Kent J. Evans, Robert J. Meyer, Kathleen M. Carmichael, Dale S. Renfer
  • Patent number: 7709168
    Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the at least one charge transport layer contains at least one phosphonium salt.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: May 4, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Edward F Grabowski, Kent J Evans, Daniel V Levy
  • Patent number: 7704656
    Abstract: A photoreceptor comprising a charge transport layer doped with a polyarylate polymer is provided. A charge transport layer is doped with about 0.1 to about 10.0% by weight, solids basis, of a polyarylate polymer, such as for example Ardel. Charge transport layers doped with a polyarylate polymer exhibit improved electrical performance in terms of lower Vr and VBG values.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: April 27, 2010
    Assignee: Xerox Corporation
    Inventors: Min-Hong Fu, Kent J. Evans, David M. Skinner, Kathleen M. Carmichael, June E. Schneider, Susan M. VanDusen
  • Publication number: 20100055588
    Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the embodiments pertain to an improved electrostatographic imaging member having a specific mixture of high mobility molecules in the charge transport layer which exhibits reduced propensity for crystallization while maintaining or improving electrical performance.
    Type: Application
    Filed: August 27, 2008
    Publication date: March 4, 2010
    Applicant: XEROX CORPORATION
    Inventors: Nancy Belknap, John F. Yanus, Helen R. Cherniack, David M. Skinner, Kent J. Evans, Edward F. Grabowski
  • Publication number: 20090325090
    Abstract: A photoconductor that includes, for example, a substrate, a first layer like a ground plane layer, an undercoat layer thereover wherein the undercoat layer contains an aminosilane and a phenolic resin, a photogenerating layer, and at least one charge transport layer.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, Dennis J. Prosser, Kathleen M. Carmichael, Sherri A. Toates, Kent J. Evans, Edward F. Grabowski
  • Patent number: 7618756
    Abstract: A photoconductor containing a supporting substrate, a photogenerating layer; and at least one charge transport layer where the photogenerating layer contains a photogenerating pigment and a chelating additive or agent.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: November 17, 2009
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Kent J. Evans, Dennis J. Prosser, Liang-Bih Lin, Raymond K. Crandall