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).

  • Publication number: 20090061335
    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 specific photoreceptor material package comprising an undercoat layer, a charge generation layer having a specific pigment blend, a long life charge transport layer, and an optional overcoat layer.
    Type: Application
    Filed: August 28, 2007
    Publication date: March 5, 2009
    Applicant: Xerox Corporation
    Inventors: Nancy L. Belknap, Lanhui Zhang, Kathryn A. Wallace, Jodie L. Watson
  • Publication number: 20080311497
    Abstract: A photoconductor that includes a substrate; an undercoat layer thereover wherein the undercoat layer comprises a metal oxide, an electron donor electron acceptor charge transfer complex; a photogenerating layer; and at least one charge transport layer.
    Type: Application
    Filed: June 18, 2007
    Publication date: December 18, 2008
    Applicant: Xerox Corporation
    Inventors: Jin Wu, Linda L. Ferrarese, Marc J. Livecchi, Lin Ma, John J. Wilbert, Lanhui Zhang
  • Patent number: 7462431
    Abstract: Photogenerating layers of photoreceptors are provided utilizing a photogenerating component/resin dispersion formed in a low boiling point solvent.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: December 9, 2008
    Assignee: Xerox Corporation
    Inventors: Cindy C. Chen, Lanhui Zhang, Nancy Lynn Belknap, Ed J. Radigan
  • Publication number: 20080299484
    Abstract: Methods for making dispersions, which are of various rheologies, various pigment/binder ratios, various particle sizes, and possess less impurities or large particles are provided. These dispersions may be utilized to form layers of photoreceptors.
    Type: Application
    Filed: May 31, 2007
    Publication date: December 4, 2008
    Inventors: Lanhui Zhang, Lin Ma, Keith T. Wong
  • Publication number: 20080280220
    Abstract: Disclosed herein is an electrophotographic imaging member comprising a substrate, and a charge generating layer containing a phthalocyanine pigment, a binder, and a solvent. The charge generating layer has a pigment particle separation distance of 28 nm or less after evaporation of the solvent. A coating system, a method of making an electrophotographic imaging member, and a method of printing also are disclosed.
    Type: Application
    Filed: May 7, 2007
    Publication date: November 13, 2008
    Inventors: Cindy C. Chen, Lanhui Zhang, Linda L. Ferrarese, James M. Markovics, Marc J. LiVecchi, Edward C. Savage, James R. Backus
  • Publication number: 20080280222
    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 specific photoreceptor material package comprising an undercoat layer, a charge generation layer comprising a single pigment in binder and having a narrow particle separation distance of the pigment particles, a long life charge transport layer, and an optional overcoat layer.
    Type: Application
    Filed: February 20, 2008
    Publication date: November 13, 2008
    Applicant: XEROX CORPORATION
    Inventors: Nancy L. Belknap, Lanhui Zhang, Kathryn A. Wallace, Jodie L. Watson
  • Publication number: 20080233503
    Abstract: A photoconductor containing a supporting substrate, a photogenerating layer, and at least one charge transport layer which contains a fluoroalkyl ester.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 25, 2008
    Inventors: Jin Wu, Steven D. Bush, Joseph A. Tumminelli, Marc J. Livecchi, Linda L. Ferrarese, Michael A. Morgan, Lanhui Zhang, Lin Ma, John J. Wilbert, Daniel V. Levy, Liang-Bih Lin
  • Publication number: 20080233502
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, at least one charge transport layer, and an overcoating layer in contact with and contiguous to the charge transport layer, and which overcoating layer includes a fluoroalkyl ester, and a polymer.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 25, 2008
    Inventors: Jin Wu, Steven D. Bush, Joseph A. Tumminelli, Lanhui Zhang, Lin Ma, Sherri A. Colon, John J. Wilbert
  • Publication number: 20080234975
    Abstract: Methods and systems for evaluating pigment dispersions with desired characteristics. More specifically, methods and systems for evaluating particle size of colorless or light color dispersions using a novel parameter described as particle size related scattering index (PSRSI).
    Type: Application
    Filed: March 20, 2007
    Publication date: September 25, 2008
    Applicant: Xerox Corporation
    Inventors: Lanhui Zhang, Lin Ma, Keith Wong, Francisco Lopez, Robert Altavela
  • Publication number: 20080233501
    Abstract: A photoconductor containing a fluoroalkyl ester layer, a supporting substrate, a photogenerating layer, and at least one charge transport layer.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 25, 2008
    Inventors: Jin Wu, Ryan J. Ehmann, Lanhui Zhang, Lin Ma, Liang-Bih Lin, Daniel V. Levy
  • Publication number: 20080187850
    Abstract: Disclosed herein is an electrophotographic imaging member comprising a supporting substrate and a charge generating layer. The charge generating layer comprises a binder, a first pigment having a first photosensitivity, and a second pigment having a second photosensitivity that is at least 2% greater than the photosensitivity of the first pigment. The first pigment has the same chemical formula, visible spectrum and crystalline structure as the second pigment. An electrostatographic apparatus including the electrophotographic imaging member also is disclosed.
    Type: Application
    Filed: February 6, 2007
    Publication date: August 7, 2008
    Inventors: Lanhui Zhang, Cindy C. Chen
  • Patent number: 7334458
    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: Grant
    Filed: August 19, 2005
    Date of Patent: February 26, 2008
    Assignee: Xerox Corporation
    Inventors: Bryan Ng, Cindy C. Chen, Lanhui Zhang
  • Publication number: 20070298340
    Abstract: Imaging members useful in electrostatographic apparatuses, including printers, copiers, other reproductive devices, and digital apparatuses. More particularly, imaging members having nano-sized particles serving as fillers dispersed or contained in one or more layers of the imaging member that provide for increased mechanical strength and improved wear.
    Type: Application
    Filed: June 22, 2006
    Publication date: December 27, 2007
    Applicant: Xerox Corporation
    Inventors: Satchidanand Mishra, Yuhua Tong, Kathleen Carmichael, Chieh-Min Cheng, Kenny-tuan Dinh, Susan Vandusen, Cindy Chen, Huoy-Jen Yuh, Lanhui Zhang
  • Publication number: 20070292794
    Abstract: A method for stabilizing a single-layer charge transport layer or a two-layer charge transport layer including a first charge transport layer and a second pass charge transport layer of an imaging member, wherein the charge transport layer or layers comprises a charge transport material, includes a) contacting surfactant, polytetrafluoroethylene particles and at least one first solvent in the absence of polymer binder to form a polytetrafluoroethylene particle slurry; b) adding and mixing the polytetrafluoroethylene particle slurry of a) to a composition comprising at least one polymer binder and at least one second solvent which is the same or different from the first solvent and processing to form a polytetrafluoroethylene particle dispersion; c) carrying out a second mixing with a base charge transport layer or small molecule transport layer solution to form a polytetrafluoroethylene particle dispersion-charge transport layer composition; and d) disposing the polytetrafluoroethylene particle dispersion-cha
    Type: Application
    Filed: June 16, 2006
    Publication date: December 20, 2007
    Inventors: Cindy C. Chen, Bryan Gar-Wah Ng, Lanhui Zhang
  • Patent number: 7297458
    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: Grant
    Filed: June 29, 2004
    Date of Patent: November 20, 2007
    Assignee: Xerox Corporation
    Inventors: Nancy L. Belknap, Andronique Ioannidis, Cindy C. Chen, Lanhui Zhang, James M. Duff, John F. Graham, Timothy P. Bender
  • Patent number: 7270926
    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: Grant
    Filed: December 15, 2004
    Date of Patent: September 18, 2007
    Assignee: Xerox Corporation
    Inventors: Lanhui Zhang, Cindy C. Chen, Nancy Lynn Belknap, Francisco J. Lopez, Liang-Bih Lin, Andronique Ioannidis, Ed J. Radigan, John S. Chambers
  • Patent number: 7270927
    Abstract: A non-halogenated binder material, such as for an electrophotographic imaging member binder, includes a copolymer of vinyl acetate and vinyl acid.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: September 18, 2007
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Francisco Lopez, Lanhui Zhang, Yuhua Tong, Liang-bih Lin, John S Chambers, Cindy Chen
  • Publication number: 20070196751
    Abstract: A charge generating composition including at least one charge generating material, at least one polymer binder, and at least one styrene-containing copolymer is disclosed.
    Type: Application
    Filed: February 17, 2006
    Publication date: August 23, 2007
    Inventors: Jin Wu, Lanhui Zhang, Cindy Chen, Liang-bih Lin
  • Publication number: 20070190295
    Abstract: An anticurl backing layer dispersion, including: a volatile carrier liquid, solid organic or inorganic particles, and a surfactant, wherein the dispersion does not include a binder. An anitcurl backing layer composition including the above-described dispersion, a binder solution comprising a binder and a volatile carrier liquid, and optionally a resin, is also disclosed.
    Type: Application
    Filed: February 10, 2006
    Publication date: August 16, 2007
    Inventors: Cindy Chen, Bryan Ng, Lanhui Zhang, Man Yip
  • Patent number: 7223507
    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: Grant
    Filed: April 4, 2003
    Date of Patent: May 29, 2007
    Assignee: Xerox Corporation
    Inventors: Andronique Ioannidis, Nancy L. Belknap, Cindy C. Chen, Lanhui Zhang, Timothy P. Bender, John F. Graham, Ah-Mee Hor, James M. Duff