Patents by Inventor Yuhua Tong

Yuhua Tong 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).

  • PHOTORECEPTOR WITH RELEASE LAYER
    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
  • PHOTORECEPTOR INTERFACIAL LAYER
    Publication number: 20100316410
    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. Embodiments pertain to an improved electrostatographic imaging member comprising an interfacial layer further comprising an opaque semi-crystalline polyester resin that is also a hot-melt adhesive to prevent light transmission to the substrate and thus significantly reduce “plywood effect,” a print quality defect.
    Type: Application
    Filed: June 16, 2009
    Publication date: December 16, 2010
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Edward F. Grabowski, Jin Wu
  • Polymer processes
    Patent number: 7851551
    Abstract: Disclosed is a process for the preparation of poly(vinylbenzyl alcohol) by, for example the hydrolysis of poly(vinylbenzyl acetate) in the presence of a basic catalyst in an organic solvent.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: December 14, 2010
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Damodar M. Pai, John F. Yanus, Markus R. Silvestri, Kenny-Tuan T Dinh, Yuhua Tong
  • CHARGE BLOCKING LAYER AND COATING SOLUTION FOR FORMING THE SAME
    Publication number: 20100310977
    Abstract: The present embodiments are generally directed to an improved imaging member exhibiting various advantages over conventional imaging members. More specifically, the present embodiments are directed to an improved charge blocking layer formed from an aqueous-based coating solution which exhibits improved shelf life and coating properties, such as increased homogeneity and adhesion, and methods for making the same. The aqueous-based coating solution is environment-friendly and avoids the need to use more expensive organic solvents which involve higher safety risks in the manufacturing process.
    Type: Application
    Filed: June 4, 2009
    Publication date: December 9, 2010
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Edward F. Grabowski
  • INTERFACIAL LAYER AND COATING SOLUTION FOR FORMING THE SAME
    Publication number: 20100297543
    Abstract: The present embodiments are generally directed to an improved imaging member exhibiting various advantages over conventional imaging members. More specifically, the present embodiments are directed to an improved interfacial layer formed from an aqueous-based coating solution which exhibits improved formation and coating properties, such as increased homogeneity and adhesion, and methods for making the same. The aqueous-based coating solution is environment-friendly and avoids the need to use more expensive organic solvents which involve higher safety risks in the manufacturing process.
    Type: Application
    Filed: May 22, 2009
    Publication date: November 25, 2010
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Edward F. Grabowski, Robert D. Bayley
  • FLEXIBLE IMAGING MEMBERS HAVING A PLASTICIZED IMAGING LAYER
    Publication number: 20100297544
    Abstract: The presently disclosed embodiments relate in general to electrophotographic imaging members, such as layered photoreceptor structural simplification, and material reformulation for making and using the same. More particularly, the embodiments pertain to the incorporation of a plasticizer into the charge transport layer such that an anticurl back coating is no longer needed for reduction or elimination of the layered photoreceptor curling.
    Type: Application
    Filed: May 22, 2009
    Publication date: November 25, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong
  • Toner compositions
    Patent number: 7833684
    Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: November 16, 2010
    Assignee: Xerox Corporation
    Inventors: Timothy L. Lincoln, Yuhua Tong, Robert D. Bayley
  • FLEXIBLE IMAGING MEMBERS WITHOUT ANTICURL LAYER
    Publication number: 20100279218
    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 the incorporation of a liquid compound having a high boiling point into the charge transport layer such that an anticurl back coating is no longer needed for reduction or elimination of photoreceptor layer curling.
    Type: Application
    Filed: May 1, 2009
    Publication date: November 4, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Yuhua Tong
  • STRUCTURALLY SIMPLIFIED FLEXIBLE IMAGING MEMBERS
    Publication number: 20100279217
    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 the incorporation of a liquid compound having a high boiling point into the charge transport layer such that an anticurl back coating is no longer needed for reduction or elimination of photoreceptor upward curling.
    Type: Application
    Filed: May 1, 2009
    Publication date: November 4, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Yuhua Tong, Michael Roetker, Edward F. Grabowski, Jimmy E. Kelly
  • COATING FOR OPTICALLY SUITABLE AND CONDUCTIVE ANTI-CURL BACK COATING LAYER
    Publication number: 20100273100
    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 incorporating a thermoplastic material pre-compounded to impart conductivity to the anti-curl back coating layer and may also contain an adhesion promoter which provides a conductively and optically anti-curl back coating layer. The conductive anti-curl back coating of the present disclosure may be formulated to have a single layer, dual layers, or triple layers.
    Type: Application
    Filed: April 24, 2009
    Publication date: October 28, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong, Edward F. Grabowski, Kock-Yee Law
  • COATING DISPERSION FOR OPTICALLY SUITABLE AND CONDUCTIVE ANTI-CURL BACK COATING LAYER
    Publication number: 20100239966
    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 incorporating a carbon nano tube dispersion into a high molecular weight polycarbonate and an anti-static copolymer with polyester, polycarbonate, and polyethylene glycol units in a formulation for the anti-curl back coating layer which provides a conductively suitable and stable dispersion coating solution for making an optically suitable anti-curl back coating layer.
    Type: Application
    Filed: March 18, 2009
    Publication date: September 23, 2010
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Edward F. Grabowski, Donald J. Goodman, Kock-Yee Law, Robert C.U. Yu
  • Process for the removal of photoreceptor coatings using a stripping solution
    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
  • Toner compositions
    Patent number: 7794911
    Abstract: A toner having a core with a first latex having a specific glass transition temperature, and further having a shell surrounding the core with a second latex having a specific glass transition temperature and possessing functional groups, and processes for producing the same.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: September 14, 2010
    Assignee: Xerox Corporation
    Inventors: Zhen Lai, Yuhua Tong, Chieh-Min Cheng, Peter V. Nguyen, Jon T. Owens
  • Photoreceptor with overcoat layer
    Patent number: 7759032
    Abstract: An electrophotographic imaging member includes a substrate, a charge generating layer, a charge transport layer, and an overcoating layer, where the overcoating layer includes a terphenyl arylamine dissolved or molecularly dispersed in a polymer binder.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: July 20, 2010
    Assignee: Xerox Corporation
    Inventors: John F. Yanus, Kenny-Tuan T. Dinh, Markus R. Silvestri, Yuhua Tong, Dale S. Renfer, T. Edwin Freeman, M. John Hinckel
  • Emulsion/aggregation process using coalescent aid agents
    Patent number: 7736831
    Abstract: A process for preparing a toner includes mixing a polymeric resin emulsion, a colorant dispersion, and a wax to form a mixture; optionally adding a coagulant to the mixture; heating the mixture at a temperature below a glass transition temperature of the polymeric resin to aggregate the polymeric resin, colorant, and wax, to form aggregated particles; adding a coalescent agent to the aggregated particles; heating the aggregated particles and coalescent agent at a temperature above the glass transition temperature of the polymeric resin, to coalesce the aggregated particles to form toner particles, optionally cooling the mixture, and isolating the tone particles.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: June 15, 2010
    Assignee: Xerox Corporation
    Inventors: Zhen Lai, Richard Fong, Yuhua Tong, Chieh-Min Cheng, Amy A. Grillo, Paul F. Smith, Paul J. Gerroir, Beng S. Ong
  • Toner compositions
    Patent number: 7727696
    Abstract: A toner having its surface functionalized with alkaline resins is provided, and processes for producing the same.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: June 1, 2010
    Assignee: Xerox Corporation
    Inventors: Zhen Lai, Yuhua Tong, Chieh-Min Cheng, Christopher M. Wolfe
  • Imaging member having nano polymeric gel particles in various layers
    Patent number: 7704658
    Abstract: Imaging members useful in electrostatographic apparatuses, including printers, copiers, other reproductive devices, and digital apparatuses. More particularly, imaging members having nano polymeric gel particles embedded into one or more layers of the imaging member that provide for increased mechanical strength and improved wear.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: April 27, 2010
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Yuhua Tong, Kathleen Carmichael, Markus R. Silvestri, Susan Vandusen, Chieh-Min Cheng, Huoy-Jen Yuh, Cindy Chen, Lanhui Zhang
  • Photoconductors
    Patent number: 7670736
    Abstract: A photoconductor containing a first layer, a supporting substrate thereover, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the first layer is in contact with the supporting substrate on the reverse side thereof, and which layer contains a semi-penetrating polymer network formed from crosslinking a suitable fluoropolymer, and within which network structure is penetrated with a polycarbonate.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: March 2, 2010
    Assignee: Xerox Corporation
    Inventors: Huoy-Jen Yuh, Robert C U Yu, Yuhua Tong, David M. Skinner
  • IMAGING MEMBER
    Publication number: 20090325094
    Abstract: Provided is an imaging member such as photoreceptor comprising a substrate, a charge generation layer, a first charge transport layer, a second charge transport layer, and an optional overcoat layer. The first charge transport layer is formed from a first CTL formulation comprising an aromatic monoamine and a first polymeric film forming binder material. The second charge transport layer is formed from a second CTL formulation comprising aromatic diamine and a second polymeric film forming binder material. The imaging member has gained improved properties such as removal of anti-curl layer, desirable structural flatness, electrical properties, mechanical robustness, flexibility, longevity, and copy image qualities over extended use, among others.
    Type: Application
    Filed: September 16, 2009
    Publication date: December 31, 2009
    Applicant: Xerox Corporation
    Inventors: Yuhua Tong, John F. Yanus, Jin Wu, Steven M. Sterling, Susan M. VanDusen
  • Imaging member having first and second charge transport layers
    Patent number: 7618757
    Abstract: Provided is an imaging member such as photoreceptor comprising a substrate, a charge generation layer, a first charge transport layer, a second charge transport layer, and an optional overcoat layer. The first charge transport layer is formed from a first CTL formulation comprising an aromatic monoamine and a first polymeric film forming binder material. The second charge transport layer is formed from a second CTL formulation comprising aromatic diamine and a second polymeric film forming binder material. The imaging member has gained improved properties such as removal of anti-curl layer, desirable structural flatness, electrical properties, mechanical robustness, flexibility, longevity, and copy image qualities over extended use, among others.
    Type: Grant
    Filed: May 11, 2005
    Date of Patent: November 17, 2009
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, John F. Yanus, Jin Wu, Steven M. Sterling, Susan M. VanDusen