Patents by Inventor Lanhui Zhang

Lanhui Zhang 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: 7205079
    Abstract: A photoconductive imaging member includes a substrate, hole blocking layer, a photogenerating layer, and a charge transport layer, wherein the charge transport layer is formed in a sol-gel process. The charge transport layer includes an in situ formed organic-inorganic composite, and exhibits increased wear resistant and retains excellent electrical properties.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: April 17, 2007
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Liang-Bih Lin, Geoffrey M. T. Foley, Cindy C. Chen, Lanhui Zhang
  • Publication number: 20070059620
    Abstract: An electrophotographic imaging member includes a substrate, an intermediate layer, and a photoconductor layer, where the intermediate layer includes surface treated oxide particles.
    Type: Application
    Filed: September 9, 2005
    Publication date: March 15, 2007
    Applicant: Xerox Corporation
    Inventors: Yuhua Tong, Cindy Chen, Lanhui Zhang
  • Publication number: 20070056359
    Abstract: Particulate material concentration of a dispersion is detected by providing a known amount of dispersion including particulate material, a solvent, and other optional components; centrifuging the dispersion and separating the particulate material from the dispersion; drying the particulate material; and weighing the particulate material to determine a particulate material concentration of the dispersion.
    Type: Application
    Filed: August 19, 2005
    Publication date: March 15, 2007
    Applicant: XEROX CORPORATION
    Inventors: Bryan Ng, Cindy Chen, Lanhui Zhang
  • Publication number: 20060257768
    Abstract: Photogenerating layers of photoreceptors are provided utilizing a photogenerating component/resin dispersion formed in a low boiling point solvent.
    Type: Application
    Filed: May 12, 2005
    Publication date: November 16, 2006
    Inventors: Cindy Chen, Lanhui Zhang, Nancy Belknap, Ed Radigan
  • Publication number: 20060240345
    Abstract: Methods for adjusting the rheology of dispersions utilized to form layers of photoreceptors are provided.
    Type: Application
    Filed: April 25, 2005
    Publication date: October 26, 2006
    Inventors: Cindy Chen, Lanhui Zhang
  • Patent number: 7115345
    Abstract: According to the present invention is an electrophotographic imaging member which is a thin dual layer structure comprising a top layer of a durable and wear-resistant layer and a bottom layer which is bipolar. The electrophotographic imaging member of the invention may be top surface charge generating or bottom surface charge generating and in either case has an overall negative charging mode of operation.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: October 3, 2006
    Assignee: Xerox Corporation
    Inventors: Andronique Ioannidis, Timothy J. Fuller, Nancy L. Belknap, Markus R. Silvestri, Cindy C. Chen, Timothy P. Bender, John F. Graham, James M. Duff, Kenny-Tuan T. Dinh, John F. Yanus, James M. Markovics, Lanhui Zhang
  • Patent number: 7094509
    Abstract: A photoconductive imaging member comprised of a photogenerating layer, and a charge transport layer containing a binder and a fluoropolymer generated by the free radical polymerization of a fluoroalkyl(methyl)acrylate and an alkyl(methyl)acrylate.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: August 22, 2006
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Cindy C. Chen, John F. Yanus, Robert C. U. Yu, Min-Hong Fu, Lanhui Zhang, Dennis J. Prosser, Susan M. VanDusen
  • Publication number: 20060127781
    Abstract: A process for preparing a charge generating layer comprising dispersing photoconductive phthalocyanine particles in a polymer matrix, the matrix comprising a polymeric film-forming reaction product of vinyl chloride, vinyl acetate, maleic acid, and hydroxyalkyl acrylate, in a solution of n-butyl acetate and methyl isobutyl ketone. An electrophotographic imaging member is also prepared comprising a charge generating layer prepared according to this process.
    Type: Application
    Filed: December 15, 2004
    Publication date: June 15, 2006
    Inventors: Lanhui Zhang, Cindy Chen, Nancy Belknap, Francisco Lopez, Liang-Bih Lin, Andronique Ioannidis, Ed Radigan, John Chambers
  • Publication number: 20060105253
    Abstract: A non-halogenated binder material, such as for an electrophotographic imaging member binder, includes a copolymer of vinyl acetate and vinyl acid.
    Type: Application
    Filed: November 15, 2004
    Publication date: May 18, 2006
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, Francisco Lopez, Lanhui Zhang, Yuhua Tong, Liang-bih Lin, John Chambers, Cindy Chen
  • 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
  • Publication number: 20060014097
    Abstract: This invention is generally directed to charge transport layers and charge transport layer formulations comprising polytetrafluoroethylene particles. This invention is also generally directed to methods of forming charge transport layers on electrophotographic imaging members. The inventive methods of forming charge transport layers provide a stable dispersion of polytetrafluoroethylene.
    Type: Application
    Filed: July 14, 2004
    Publication date: January 19, 2006
    Applicant: XEROX CORPORATION
    Inventors: Philip Perry, Mark Thomas, Cindy Chen, Lanhui Zhang, Man Yip, Linnette Perales Rivera, April Mattox, Kenneth Gottschalk, Petrus de Saegher, Robert Hedrick
  • Publication number: 20060008718
    Abstract: A photoconductive imaging member includes a substrate, hole blocking layer, a photogenerating layer, and a charge transport layer, wherein the charge transport layer is formed in a sol-gel process. The charge transport layer includes an in situ formed organic-inorganic composite, and exhibits increased wear resistant and retains excellent electrical properties.
    Type: Application
    Filed: July 9, 2004
    Publication date: January 12, 2006
    Inventors: Jin Wu, Liang-Bih Lin, Geoffrey Foley, Cindy Chen, Lanhui Zhang
  • Publication number: 20050287454
    Abstract: A photoconductive member containing a supporting substrate, a photogenerating layer, and a charge transport layer and wherein the photogenerating layer comprises a photogenerating component, and an electron transport component.
    Type: Application
    Filed: June 29, 2004
    Publication date: December 29, 2005
    Inventors: Nancy Belknap, Andronique Ioannidis, Cindy Chen, Lanhui Zhang, James Duff, John Graham, Timothy Bender
  • Publication number: 20050266326
    Abstract: According to the present invention is an electrophotographic imaging member which is a thin dual layer structure comprising a top layer of a durable and wear-resistant layer and a bottom layer which is bipolar. The electrophotographic imaging member of the invention may be top surface charge generating or bottom surface charge generating and in either case has an overall negative charging mode of operation.
    Type: Application
    Filed: February 17, 2004
    Publication date: December 1, 2005
    Inventors: Andronique Ioannnidis, Timothy Fuller, Nancy Belknap, Markus Silvestri, Cindy Chen, Timothy Bender, John Graham, James Duff, Kenny-Tuan Dinh, John Yanus, James Markovics, Lanhui Zhang
  • Publication number: 20050164104
    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: Application
    Filed: January 22, 2004
    Publication date: July 28, 2005
    Inventors: Yuhua Tong, Satchidanand Mishra, Anthony Horgan, John Yanus, Dale Renfer, Robert Yu, Markus Silvestri, Cindy Chen, Lanhui Zhang
  • 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: 6858363
    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 a metallic component and an electron transport component.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: February 22, 2005
    Assignee: Xerox Corporation
    Inventors: Nancy L. Belknap, Cindy C. Chen, Lanhui Zhang, Andronique Ioannidis, James M. Duff, John F. Graham, Timothy P. Bender
  • Publication number: 20050014080
    Abstract: A photoconductive imaging member comprised of a photogenerating layer, and a charge transport layer containing a binder and a fluoropolymer generated by the free radical polymerization of a fluoroalkyl (methyl)acrylate and an alkyl(methyl)acrylate.
    Type: Application
    Filed: July 18, 2003
    Publication date: January 20, 2005
    Inventors: Yuhua Tong, Timothy Fuller, Cindy Chen, John Yanus, Robert Yu, Min-Hong Fu, Lanhui Zhang, Dennis Prosser, Susan VanDusen
  • Publication number: 20040197686
    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 a metallic component and an electron transport component.
    Type: Application
    Filed: April 4, 2003
    Publication date: October 7, 2004
    Applicant: Xerox Corporation
    Inventors: Nancy L. Belknap, Cindy C. Chen, Lanhui Zhang, Andronique Ioannidis, James M. Duff, John F. Graham, Timothy P. Bender
  • Publication number: 20040197685
    Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, charge transport components, and a certain electron transport component, and a certain polymer binder.
    Type: Application
    Filed: April 4, 2003
    Publication date: October 7, 2004
    Applicant: Xerox Corporation
    Inventors: Andronique loannidis, Nancy L. Belknap, Cindy C. Chen, Lanhui Zhang, Timothy P. Bender, John F. Graham, Ah-Mee Hor, James M. Duff