Patents by Inventor Sheau Van Kao

Sheau Van Kao 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: 8118922
    Abstract: A pigmented phase change ink composition comprising an ink vehicle, a dispersant, and pigment particles wherein the dispersant is a chemical compound of formula: wherein R1 is an alkyl group, aryl group, alkylaryl group or arylalkyl group with at least 23 carbon atoms, R2 is an alkylene group, arylene group, alkylarylene group or arylalkylene group with at least 2 carbons and X is a quaternary ammonium salt. The ink can be resistant to substantial aggregation and settling of the pigment particles in the melt and even when exposed to freeze thaw cycles.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: February 21, 2012
    Assignee: Xerox Corporation
    Inventors: Adela Goredema, C. Geoffrey Allen, Caroline M. Turek, Christopher Wagner, Raymond Wong, Mihaela Maria Birau, Sheau Van Kao
  • Patent number: 7906581
    Abstract: Methods, apparatuses, and systems for manufacturing a hot melt adhesive containing an adhesion promoter in a continuous mode include supplying a melted, hot melt adhesive to a mixing device at a first predetermined rate while simultaneously supplying an adhesion promoter to the same mixing device at a second predetermined rate to form a homogeneous admixture containing the hot melt adhesive and adhesion promoter. The hot melt adhesive/adhesion promoter mixture is subsequently reacted in at least one tubular reactor at a predetermined temperature for a predetermined residence time to allow the adhesion promoter to chemically bond with the hot melt adhesive and form an adhesive-promoter-treated hot melt adhesive. The adhesion-promoter-treated hot melt adhesive is collected in a product receiver and may be further processed.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: March 15, 2011
    Assignee: Xerox Corporation
    Inventors: Frank Ping-Hay Lee, Tie Hwee Ng, Sheau Van Kao, Guiqin Song
  • Publication number: 20100288162
    Abstract: A pigmented phase change ink composition comprising an ink vehicle, a dispersant, and pigment particles wherein the dispersant is a chemical compound of formula: wherein R1 is an alkyl group, aryl group, alkylaryl group or arylalkyl group with at least 23 carbon atoms, R2 is an alkylene group, arylene group, alkylarylene group or arylalkylene group with at least 2 carbons and X is a quaternary ammonium salt. The ink can be resistant to substantial aggregation and settling of the pigment particles in the melt and even when exposed to freeze thaw cycles.
    Type: Application
    Filed: May 18, 2009
    Publication date: November 18, 2010
    Applicant: XEROX CORPORATION
    Inventors: Adela GOREDEMA, C. Geoffrey ALLEN, Caroline M. TUREK, Christopher WAGNER, Raymond WONG, Mihaela Maria BIRAU, Sheau Van KAO
  • Patent number: 7556679
    Abstract: The presently disclosed embodiments are directed to processes for making phase change or solid ink used in ink jet system recording apparatuses (e.g., printer, copying machine, facsimile, word processor, plotter, and the like). More particularly, the embodiments pertain to the preparation of pigment or dye-based solid ink using a rotor-stator style, in-line homogenizer.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: July 7, 2009
    Assignee: Xerox Corporation
    Inventors: Frank Ping-Hay Lee, Raymond Wan-Ning Wong, Sheau Van Kao
  • Publication number: 20090062464
    Abstract: Methods, apparatuses, and systems for manufacturing a hot melt adhesive containing an adhesion promoter in a continuous mode include supplying a melted, hot melt adhesive to a mixing device at a first predetermined rate while simultaneously supplying an adhesion promoter to the same mixing device at a second predetermined rate to form a homogeneous admixture containing the hot melt adhesive and adhesion promoter. The hot melt adhesive/adhesion promoter mixture is subsequently reacted in at least one tubular reactor at a predetermined temperature for a predetermined residence time to allow the adhesion promoter to chemically bond with the hot melt adhesive and form an adhesive-promoter-treated hot melt adhesive. The adhesion-promoter-treated hot melt adhesive is collected in a product receiver and may be further processed.
    Type: Application
    Filed: September 5, 2007
    Publication date: March 5, 2009
    Applicant: XEROX CORPORATION
    Inventors: Frank Ping-Hay LEE, Tie Hwee NG, Sheau Van KAO, Guiqin Song
  • Patent number: 5516612
    Abstract: Disclosed is a process for enhancing xerographic developer tribo product longevity comprising providing developer particles comprised of a toner comprised of at least one resin, pigment, charge additive, surface additive particles, a charge control agent retention additive or compound, and a carrier.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: May 14, 1996
    Assignee: Xerox Corporation
    Inventors: George W. Vianco, Sheau Van Kao, Michelle M. Bruzee
  • Patent number: 5082919
    Abstract: A toner composition comprised of a crosslinked thermotropic liquid crystalline polymer, a branched liquid crystalline polymer, or mixtures thereof.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: January 21, 1992
    Assignee: Xerox Corporation
    Inventors: Guerino Sacripante, T. Brian McAneney, Stephan Drappel, Sheau Van Kao, Lupu Alexandru