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).

  • IMAGING MEMBER HAVING NANO POLYMERIC GEL PARTICLES IN VARIOUS LAYERS
    Publication number: 20090269687
    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: Application
    Filed: July 15, 2009
    Publication date: October 29, 2009
    Applicant: XEROX CORPORATION
    Inventors: Satchidanand Mishra, Yuhua Tong, Kathleen Carmichael, Markus Silvestri, Susan Vandusen, Chieh-Min Cheng, Huoy-Jen Yuh, Cindy Chen, Lanhui Zhang
  • LATEX PROCESSES
    Publication number: 20090246680
    Abstract: Processes for continuously forming latex emulsions useful in preparing toners are provided which do not require the use of solvents.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 1, 2009
    Applicant: Xerox Corporation
    Inventors: Joo T. Chung, Zhen Lai, Chieh-Min Cheng, Joseph L. Leonardo, Yuhua Tong, Timothy L. Lincoln, Samir Kumar, Christine Louise DeMay
  • IMAGING MEMBER HAVING NANO POLYMERIC GEL PARTICLES IN VARIOUS LAYERS
    Publication number: 20090239166
    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: Application
    Filed: June 22, 2006
    Publication date: September 24, 2009
    Applicant: Xerox Corporation
    Inventors: Satchidanand Mishra, Yuhua Tong, Kathleen Carmichael, Markus Silvestri, Susan Vandusen, Chieh-Min Cheng, Huoy-Jen Yuh, Cindy Chen, Lanhui Zhang
  • Imaging member
    Patent number: 7592111
    Abstract: An electrostatographic imaging member formulated with a liquid carbonate is provided. The imaging electrostatographic member exhibits improved service life.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: September 22, 2009
    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
  • Imaging member having nano polymeric gel particles in various layers
    Patent number: 7582399
    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: June 22, 2006
    Date of Patent: September 1, 2009
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Yuhua Tong, Kathleen Carmichael, Markus Silvestri, Susan Vandusen, Chieh-Min Cheng, Huoy-Jen Yuh, Cindy Chen, Lanhui Zhang
  • Imaging member
    Patent number: 7579125
    Abstract: An imaging member has a crosslinked overcoat layer which holds fluorinated nanoparticles. The overcoat layer is formed from an overcoat solution comprising a polymer binder; a hole transport molecule; fluorinated nanoparticles; a fluorinated surfactant; a crosslinking agent; and a free radical initiator. The overcoat layer provides excellent wear resistance at a low cost.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: August 25, 2009
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Kathleen M. Carmichael, Edward F. Grabowski
  • CHARGE CONTROL AGENTS FOR TONER COMPOSITIONS
    Publication number: 20090202931
    Abstract: The present disclosure provides polymer-ionic complexes useful as charge control agents. Such charge control agents may be utilized with toner particles to impart excellent triboelectric charging characteristics to the toner.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 13, 2009
    Inventors: Timothy L. Lincoln, Timothy J. Key, Robert D. Bayley, Yuhua Tong
  • Imaging member
    Patent number: 7569317
    Abstract: An imaging member is disclosed which includes a charge generating layer and a charge transport layer. The charge transport layer includes a first charge transport layer adjacent the charge generating layer and at least a second charge transport layer adjacent the first charge transport layer. Each charge transport layer includes a film forming polymer binder and a charge transport material dispersed therein. The first charge transport material has a composition which is the same or different than the second charge transport material and of a lower concentration. It may be selected from an aryl amine, aryl diamine, or combinations thereof. The combination has the effect of reducing charge deficient spots.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: August 4, 2009
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Kathleen M. Carmichael, Yuhua Tong, Anthony M. Horgan, Edward F. Grabowski, Richard L. Post, Susan M. VanDusen
  • Imaging member
    Patent number: 7563549
    Abstract: Provided is an imaging member comprising a substrate, an undercoat layer (UCL), a charge generation layer, a charge transport layer, and an optional overcoat layer. The undercoat layer is formed from a single-phase UCL coating formulation comprising an organic titanate, a polymer containing active hydrogen, and an aminosilane. The UCL formulation has improved properties such as stability, processing convenience, and longer pot life etc. The UCL formulation can be used to manufacture an imaging member such as photoreceptor with improved properties such as stable, thick UCL coating, resistance to electrical failure, and PIDC independency on UCL thickness etc.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: July 21, 2009
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Yuhua Tong, Jennifer Y. Hwang, Liang-bih Lin, Andronique Ioannidis, Nancy L. Belknap, Timothy J. O'Brien, Anthony Uttaro, Jr.
  • Toner compositions
    Patent number: 7553601
    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 30, 2009
    Assignee: Xerox Corporation
    Inventors: Zhen Lai, Yuhua Tong, Chieh-Min Cheng, Christopher M. Wolfe
  • TONER COMPOSITIONS
    Publication number: 20090123862
    Abstract: The present disclosure provides toners including amorphous resins and crystalline resins. Toners with high glass transition temperatures and little plasticization may be obtained in accordance with the present disclosure.
    Type: Application
    Filed: November 14, 2007
    Publication date: May 14, 2009
    Inventors: Mark E. Mang, Timothy L. Lincoln, Yuhua Tong, Kevin F. Marcell
  • TONER COMPOSITIONS
    Publication number: 20090123860
    Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics.
    Type: Application
    Filed: November 14, 2007
    Publication date: May 14, 2009
    Inventors: Timothy L. Lincoln, Yuhua Tong, Robert D. Bayley
  • Imaging member having nano-sized phase separation in various layers
    Patent number: 7524597
    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: Grant
    Filed: June 22, 2006
    Date of Patent: April 28, 2009
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Yuhua Tong, Kathleen Carmichael, Chieh-Min Cheng, Kenny-tuan Dinh, Susan Vandusen, Cindy Chen, Huoy-Jen Yuh, Lanhui Zhang
  • Toner composition
    Patent number: 7507513
    Abstract: Copolymer encapsulated wax particles and their use in forming toner compositions having particles with a desired circularity and size are provided.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: March 24, 2009
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Chieh-Min Cheng, Louis V. Isganitis, Eunhee Lee, Zhen Lai
  • Toner compositions
    Publication number: 20090061343
    Abstract: A toner having its surface functionalized with functional groups, and processes for producing the same, are provided.
    Type: Application
    Filed: September 4, 2007
    Publication date: March 5, 2009
    Inventors: Zhen Lai, Yuhua Tong, Chieh-Min Cheng
  • Hydrolyzed semi-conductive nanoparticles for imaging member undercoating layers
    Patent number: 7476479
    Abstract: An imaging member includes a substrate, an intermediate layer, and a photoconductor layer, where the intermediate layer includes hydrolyzed semi-conductive nanoparticles, such as hydrolyzed semi-conductive nanoparticles formed by reaction of a metal alkoxide and an amine.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: January 13, 2009
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, John J. Wilbert, John F. Yanus, Jin Wu, Jennifer Y. Hwang
  • Toner compositions
    Publication number: 20080299479
    Abstract: Stabilizer compositions are provided having carboxylic acid groups. By esterifying some of the available carboxylic acid groups, the carboxylic acid number of the stabilizer may be adjusted. Such stabilizers may be utilized, in embodiments, for forming toner compositions.
    Type: Application
    Filed: May 31, 2007
    Publication date: December 4, 2008
    Inventors: Yuhua Tong, Chieh-Min Cheng
  • Imaging member
    Patent number: 7459251
    Abstract: An imaging member comprising a barrier or under-layer intermediate a photogenerating layer and charge transport layer to reduce charge deficiency spots. The barrier under-layer comprises a film forming polymer binder selected from a conductive polymer binder, a non-conductive polymer binder, or mixtures thereof. Optionally, the barrier layer can include a small amount of a charge transport material.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: December 2, 2008
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Kathleen M. Carmichael, Yuhua Tong, Anthony M. Horgan, Edward F. Grabowski, Richard L. Post, Robert C. U. Yu, Dennis J. Prosser, Edward Domm, Min-Hong Fu
  • Hole transportation polymers for photoreceptor devices
    Patent number: 7452642
    Abstract: Hole transport polymers are disclosed. The polymers include modified triarylamine groups attached to a polymeric material such as, for example, poly(vinyl butyral). The polymers are particularly suited for use in multilayered photoreceptors. The polymers can be readily synthesized. Also disclosed are photoreceptors containing one or more layers that include the noted polymers.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: November 18, 2008
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, John F. Yanus
  • Photoconductors
    Publication number: 20080241721
    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: Application
    Filed: March 29, 2007
    Publication date: October 2, 2008
    Inventors: Huoy-Jen Yuh, Robert C U Yu, Yuhua Tong, David M. Skinner