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).

  • Publication number: 20120009371
    Abstract: Described herein is an intermediate transfer member that includes a layer of phenoxy resin having dispersed therein conductive particles.
    Type: Application
    Filed: July 9, 2010
    Publication date: January 12, 2012
    Applicant: XEROX CORPORATION
    Inventors: Dante M. Pietrantoni, Yuhua Tong, Michael S. Roetker, Francisco J. Lopez, Kyle B. Tallman, Jonathan H. Herko, Jin Wu
  • Publication number: 20120003575
    Abstract: The presently disclosed embodiments are directed to imaging members used in electrostatography. More particularly, the embodiments pertain to electrophotographic imaging members which have an added-on protective overcoat layer formulated to comprise of a novel A-B diblock copolymer comprising two segmental blocks of a bisphenol polycarbonate and an organic acid terminal which provides chemical vapor contaminant resistive property. The overcoat layer may further be formulated to include small quantity of charge transport compound. The present embodiments provide superior copy printout quality.
    Type: Application
    Filed: June 30, 2010
    Publication date: January 5, 2012
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong
  • Publication number: 20110318675
    Abstract: The presently disclosed embodiments are directed to layer(s) that are useful in imaging apparatus members and components, for use in electrophotography, including digital, apparatuses. More particularly, the present embodiments provide the negatively charged electrophotographic imaging members with a novel cross-linked charge blocking undercoat layer, which is created to comprise of a binary composition of melamine and formaldehyde or a triple composition consisting of a hydroxyl functional acrylic polyol binder and a methylolation of melamine-formaldehyde, and methods for making the same. The charge blocking layer provides stabilized cyclic photo-electrical properties, enhanced mechanical adhesion bonding, and improved copy print out quality for service life extension.
    Type: Application
    Filed: June 25, 2010
    Publication date: December 29, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong, Min-Hong Fu, Stephen T. Avery
  • Patent number: 8080353
    Abstract: A toner having its surface functionalized with functional groups, and processes for producing the same, are provided.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: December 20, 2011
    Assignee: Xerox Corporation
    Inventors: Zhen Lai, Yuhua Tong, Chieh-Min Cheng
  • Publication number: 20110305981
    Abstract: The presently disclosed embodiments are directed to imaging members used in electrostatography. More particularly, the embodiments pertain to electrophotographic imaging members which have imaging layer(s) formulated to comprise of a novel A-B diblock copolymer binder consisting of two segmental blocks of a bisphenol polycarbonate and a phthalic acid which provides chemical vapor contaminant resistive property. The present embodiments provide superior copy printout quality.
    Type: Application
    Filed: June 10, 2010
    Publication date: December 15, 2011
    Inventors: Robert C. U. Yu, Yuhua Tong
  • Publication number: 20110287352
    Abstract: Present embodiments are directed to the preparation of curl-free flexible imaging members used in electrostatography. More particularly, the embodiments pertain to a structurally simplified flexible electrophotographic imaging member, including the incorporation of a plasticizer or a blend of plasticizers in the imaging layer(s) to effect imaging layer(s) stress relieving outcome for curl control without the need of an anticurl back coating, and methods for making and using the imaging member.
    Type: Application
    Filed: May 18, 2010
    Publication date: November 24, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong
  • Publication number: 20110269062
    Abstract: A photoconductor that includes, for example, a supporting substrate, an undercoat layer thereover wherein the undercoat layer contains a metal oxide, a phenolic resin, and a phosphate; a photogenerating layer; and at least one charge transport layer.
    Type: Application
    Filed: April 28, 2010
    Publication date: November 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Jin Wu, Nancy L. Belknap, Helen R. Cherniack, Marc J. Livecchi
  • Publication number: 20110256474
    Abstract: The presently disclosed embodiments relate in general to electrostatography comprising improved features in the flexible imaging member that enhance function when used in the electrostatographic imaging system. These embodiments pertain, more particularly, to a structurally simplified curl-free flexible electrostatographic imaging member belt containing a stress/strain free ground strip layer and stress/strain free imaging layer(s) to improve dynamic belt cyclic motion quality and extend service life.
    Type: Application
    Filed: April 16, 2010
    Publication date: October 20, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Yuhua Tong, Michael S. Roetker, Jimmy E. Kelly, Kyle B. Tallman
  • Publication number: 20110245541
    Abstract: A compound of the formula wherein R1, R2, R3, and R4 can be the same or different, and wherein each of R1, R2, R3, and R4 are independently selected from (i) hydrogen, (ii) an alkyl group, (iii) an aryl group, (iv) an arylalkyl group, (v) an alkylaryl group, (vi) an alkoxy group, (vii) an aryloxy group, (viii) an arylalkyloxy group, (ix) an alkylaryloxy group; and wherein R5 is (i) an alkylene group, (ii) an arylene group, which can be substituted or unsubstituted arylene, and wherein hetero atoms may optionally be present in the arylene group, (iii) an arylalkylene group, or (iv) an alkylarylene group. Further, a process for preparing a charge transport compound comprises contacting a hydroxy-functionalized triarylamine with a dihalide in an alkaline-water solution at room temperature; wherein the raw material for the dihalide comprises a purified or recovered halogen-organic solvent-containing waste stream.
    Type: Application
    Filed: April 1, 2010
    Publication date: October 6, 2011
    Applicant: XEROX CORPORATION
    Inventor: Yuhua Tong
  • Publication number: 20110244247
    Abstract: An intermediate transfer media, such as a belt, that includes a fluoropolyimide polymer.
    Type: Application
    Filed: March 30, 2010
    Publication date: October 6, 2011
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, Yu Qi, Nan-Xing Hu, Yuhua Tong
  • Publication number: 20110244203
    Abstract: A UV curable intermediate transfer media, such as a belt, that includes a first supporting substrate, such as a polyimide substrate layer, and a second surface layer of a mixture of a carbon nanotube component, a photoinitiator component, and an organic inorganic hybrid component.
    Type: Application
    Filed: March 30, 2010
    Publication date: October 6, 2011
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, Yuhua Tong, Brian P. Gilmartin, Jonathan H. Herko
  • Publication number: 20110244202
    Abstract: An intermediate transfer media, such as a belt, that includes a first optional polyimide substrate layer, and a second layer of a fluoropolyimide polymer.
    Type: Application
    Filed: March 30, 2010
    Publication date: October 6, 2011
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, Yu Qi, Nan-Xing Hu, Yuhua Tong
  • Publication number: 20110236811
    Abstract: The present embodiments are generally directed to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. More particularly, the embodiments pertain to an electrophotographic imaging member having a novel charge transport layer formed from a coating solution that is doped with specific solvents which provides a charge transport layer with superior electrical properties, and methods for making the same. In particular, the coating solution is doped with a small amount of an aprotic organic solvent.
    Type: Application
    Filed: March 24, 2010
    Publication date: September 29, 2011
    Applicant: XEROX CORPORATION
    Inventors: Edward F. Grabowski, Yuhua Tong
  • Publication number: 20110229808
    Abstract: Present embodiments are directed to the improvement of flexible imaging members used in electrophotography. More particularly, embodiments pertain to a structurally simplified curl-free flexible electrophotographic imaging member without the need for an anticurl back coating, having a functionally improved top outermost exposed slippery imaging layer which furthers extends service life, and provides a process for making and using the member.
    Type: Application
    Filed: March 17, 2010
    Publication date: September 22, 2011
    Applicant: Xerox Corporation
    Inventors: Robert C. U. Yu, Yuhua Tong, Stephen T. Avery
  • Publication number: 20110207038
    Abstract: A flexible imaging member comprising a slippery charge transport layer including a novel low surface energy polymer binder and a charge transport compound in the layer. In specific embodiments, the novel low surface energy polymer binder in the charge transport layer is a bisphenol A polycarbonate containing short polysiloxane segments present in the polycarbonate backbone—thus eliminating the light scattering effect to render optical clarity—and the charge transport compound is a diamine hole transporting species. The imaging member does include an anticurl back coating to maintain flatness.
    Type: Application
    Filed: February 24, 2010
    Publication date: August 25, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong, Stephen T. Avery, Jimmy E. Kelly
  • Patent number: 8003285
    Abstract: Embodiments pertain to a flexible imaging member used in electrostatography and processes for making and using the imaging member. More particularly, the embodiments pertain to a structurally simplified flexible electrophotographic imaging member that has reasonable flatness and exhibits good performance without the need of an anticurl back coating layer.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: August 23, 2011
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Yuhua Tong, Stephen T. Avery, Michael S. Roetker
  • Publication number: 20110196066
    Abstract: A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one amorphous polyester resin with a viscosity reducing additive in the absence of an organic solvent to form a resin mixture either via an extruder or batch process, and adding a surfactant, neutralizing agent, and deionized water to the resin mixture.
    Type: Application
    Filed: February 5, 2010
    Publication date: August 11, 2011
    Applicant: XEROX CORPORATION
    Inventors: Santiago Faucher, Joo T. Chung, Timothy L. Lincoln, Shigang Qiu, Yuhua Tong, Fumii Higuchi, Emine Irmak Serifoglu, Allan K. Chen, Brian J. Andaya, Joseph L. Leonardo
  • Publication number: 20110183244
    Abstract: Embodiments relate generally to an imaging member that facilitates removal of the imaging member coating layers disposed over the imaging member and environmentally or “green” methods for using the same. More specifically, the present embodiments disclose an electrophotographic photoreceptor that includes a specifically formulated undercoat layer that allows easy removal of the photoreceptor layers disposed on top of the undercoat layer. The present embodiments provide a simple yet efficient method for reclaiming recycling or remanufacturing electrophotographic photoreceptors.
    Type: Application
    Filed: January 22, 2010
    Publication date: July 28, 2011
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, Yuhua Tong, Helen R. Cherniack, Edward F. Grabowski, Kent J. Evans, Nancy L. Belknap
  • Publication number: 20110180099
    Abstract: Embodiments relate generally to an imaging member that facilitates removal of the imaging member coating layers disposed over the imaging member and environmentally or “green” methods for using the same. More specifically, the present embodiments disclose an electrophotographic photoreceptor that includes a specifically formulated undercoat layer that allows easy removal of the photoreceptor layers disposed on top of the undercoat layer. The present embodiments provide a simple yet efficient method for reclaiming recycling or remanufacturing electrophotographic photoreceptors.
    Type: Application
    Filed: January 22, 2010
    Publication date: July 28, 2011
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, Yuhua Tong, Helen R. Cherniack, Edward F. Grabowski, Kent J. Evans, Nancy L. Belknap
  • Publication number: 20110183245
    Abstract: A photoconductor that includes a supporting substrate, an optional ground plane layer, an optional hole blocking layer, a photogenerating layer, and at least one charge transport layer, and where the charge transport layer contains a polyamideimide.
    Type: Application
    Filed: January 28, 2010
    Publication date: July 28, 2011
    Applicant: Xerox Corporation
    Inventors: Jin Wu, Yuhua Tong, Linda L. Ferrarese, Edward C. Savage