Patents by Inventor Joanne Liu

Joanne Liu 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: 20200299605
    Abstract: Lubricating oil composition is provided. The composition includes several components including a major amount of a base oil, a mixture of alkylated diphenylamines having a weight ratio of mono-alkylated diphenylamine to di-alkylated diphenylamine ranging from 0.6 to 4.0, and a molybdenum or sulfur additive that provides synergistic enhancement of oxidation stability in combination with the mixture of alkylated diphenylamines.
    Type: Application
    Filed: March 17, 2020
    Publication date: September 24, 2020
    Applicant: CHEVRON ORONITE COMPANY LLC
    Inventors: Ryan OLIVER, Andrew Michael THOMAS, Joanne LIU
  • Patent number: 10450525
    Abstract: The present invention is directed to a process of making alkanolamides wherein the “aging” time is reduced and the diethanol amide to ester ratio in the finished product is increased. Further provided is an additive composition comprising an alkanolamide which contains a reduced amount of DEA and BHEP.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: October 22, 2019
    Assignee: Chevron Oronite Company LLC
    Inventors: Yat Fan Suen, Joanne Liu, Francois Simard, Yuen Ting Anita Leung
  • Publication number: 20160060560
    Abstract: The present invention is directed to a process of making alkanolamides wherein the “aging” time is reduced and the diethanol amide to ester ratio in the finished product is increased. Further provided is an additive composition comprising an alkanolamide which contains a reduced amount of DEA and BHEP.
    Type: Application
    Filed: August 27, 2014
    Publication date: March 3, 2016
    Applicant: Chevron Oronite Company LLC
    Inventors: Yat Fan Suen, Joanne Liu, Francois Simard, Yuen Ting Anita Leung
  • Patent number: 7910081
    Abstract: The invention provides a process for the production of fumed silica. The process comprises providing a silicon halide feedstock comprising about 80% to 100% methyltrichlorosilane, combining the silicon halide feedstock with hydrogen gas and oxygen gas to form a reactant mixture, discharging the reactant mixture out of a burner, and combusting the hydrogen gas and the oxygen gas of the reactant mixture so as to hydrolyze the silicon halide feedstock to produce fumed silica. Hydrogen (H2) is present in a mole fraction of about 0.11 or less based on the reactant mixture, and/or the velocity of the reactant mixture upon exiting the burner is about 25 m/s or more.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: March 22, 2011
    Assignee: Cabot Corporation
    Inventors: Joanne Liu, Yakov E. Kutsovsky, George P. Fotou
  • Publication number: 20090286888
    Abstract: The invention provides an aqueous dispersion of aggregate silica particles comprising aggregate silica particles having an aggregate structure comprised of fused primary particles, wherein the aggregate silica particles have a primary particle diameter and an aggregate particle diameter, and the average of the primary particle diameters (dp), the number average of the aggregate particle diameters (Dcirc ave) and the geometric standard deviation of the aggregate particle diameters (?g (Dcirc)) satisfies at least one of the two following equations: (1) Dcirc ave (nm)<52+2dp (nm) for silica, and (2) ?g(Dcirc)<1.44+0.011dp (nm) for silica. The invention also provides an aqueous dispersion of aggregate alumina particles.
    Type: Application
    Filed: July 27, 2009
    Publication date: November 19, 2009
    Applicant: Cabot Corporation
    Inventors: Joanne Liu, Yakov E. Kutsovsky
  • Patent number: 7584910
    Abstract: A method of preparing a dispersion of aggregate metal oxide particles having a pre-selected average aggregate particle diameter comprising pre-selecting a desired percent-reduction in the average aggregate particle diameter of the metal oxide particles, providing a dispersion standard pertaining to a dispersion of the aggregate metal oxide particles, wherein the dispersion standard correlates (i) the solids concentration of the dispersion with (ii) the percent-reduction in the aggregate particle diameter of the aggregate metal oxide particles that occurs when the dispersion is milled in a high-shear mixer, and preparing and milling a dispersion of the aggregate metal oxide particles in a high-shear milling device at a solids concentration that is within 10% of the solids concentration determined by the standard to provide a dispersion of aggregate metal oxide particles having the desired average aggregate particle diameter.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: September 8, 2009
    Assignee: Cabot Corporation
    Inventors: Joanne Liu, Yakov E. Kutsovsky
  • Publication number: 20070253884
    Abstract: The invention provides a process for the production of fumed silica. The process comprises providing a silicon halide feedstock comprising about 80% to 100% methyltrichlorosilane, combining the silicon halide feedstock with hydrogen gas and oxygen gas to form a reactant mixture, discharging the reactant mixture out of a burner, and combusting the hydrogen gas and the oxygen gas of the reactant mixture so as to hydrolyze the silicon halide feedstock to produce fumed silica. Hydrogen (H2) is present in a mole fraction of about 0.11 or less based on the reactant mixture, and/or the velocity of the reactant mixture upon exiting the burner is about 25 m/s or more.
    Type: Application
    Filed: April 25, 2007
    Publication date: November 1, 2007
    Applicant: Cabot Corporation
    Inventors: Joanne Liu, Yakov Kutsovsky, George Fotou
  • Publication number: 20060088783
    Abstract: A method of preparing a dispersion of aggregate metal oxide particles having a pre-selected average aggregate particle diameter comprising pre-selecting a desired percent-reduction in the average aggregate particle diameter of the metal oxide particles, providing a dispersion standard pertaining to a dispersion of the aggregate metal oxide particles, wherein the dispersion standard correlates (i) the solids concentration of the dispersion with (ii) the percent-reduction in the aggregate particle diameter of the aggregate metal oxide particles that occurs when the dispersion is milled in a high-shear mixer, and preparing and milling a dispersion of the aggregate metal oxide particles in a high-shear milling device at a solids concentration that is within 10% of the solids concentration determined by the standard to provide a dispersion of aggregate metal oxide particles having the desired average aggregate particle diameter.
    Type: Application
    Filed: May 4, 2005
    Publication date: April 27, 2006
    Applicant: Cabot Corporation
    Inventors: Joanne Liu, Yakov Kutsovsky
  • Patent number: 6861112
    Abstract: The invention provides an aqueous dispersion comprising fumed silica particles, colloidal silica particles, and water. The fumed silica particles have a BET surface area of about 70 to about 140 m2/g, and the colloidal silica particles have a BET surface area of about 110 to about 150 m2/g. Also, the total amount of silica in the dispersion is about 35% to about 60% by weight, and the fumed silica particles comprise about 25% to about 80% by weight of the total amount of silica in the dispersion. The invention also provides a coating composition and a recording medium incorporating the inventive dispersion.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: March 1, 2005
    Assignee: Cabot Corporation
    Inventors: Michael D. Morris, Joanne Liu, Steven E. Brown
  • Publication number: 20040097631
    Abstract: The invention provides an aqueous dispersion comprising fumed silica particles, colloidal silica particles, and water. The fumed silica particles have a BET surface area of about 70 to about 140 m2/g, and the colloidal silica particles have a BET surface area of about 110 to about 150 m2/g. Also, the total amount of silica in the dispersion is about 35% to about 60% by weight, and the fumed silica particles comprise about 25% to about 80% by weight of the total amount of silica in the dispersion. The invention also provides a coating composition and a recording medium incorporating the inventive dispersion.
    Type: Application
    Filed: November 15, 2002
    Publication date: May 20, 2004
    Applicant: Cabot Corporation
    Inventors: Michael D. Morris, Joanne Liu, Steven E. Brown