Patents by Inventor Gangkai Zhao

Gangkai Zhao 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).

  • Mineral oils containing phenolic antioxidants with improved color stability
    Patent number: 8933004
    Abstract: This invention relates to a mineral oil containing hindered phenolic antioxidants with improved color stability. More particularly, it relates to non-coloring hindered phenolic blend that contains an oxygen scavenger, i.e., dibenzylhydroxyl amine (DBHA) as well as mineral oils containing such a blend.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: January 13, 2015
    Assignee: SI Group, Inc.
    Inventors: Bo Liu, Vince J. Gatto, Gangkai Zhao
  • Antioxidant blends suitable for use in biodiesels
    Patent number: 8663344
    Abstract: This invention provides stabilized biodiesels comprising (1) biodiesel, such as fatty acid methyl ester (FAME), (2) mono- or bis-hindered phenolic derived from 2,6-di-tert-butylphenol, and (3) N,N-di-substituted para-phenylene diamine. Also methods of stabilizing biodiesel are provided involving adding (2) and (3) to (1).
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: March 4, 2014
    Assignee: Albemarle Corporation
    Inventors: Emily R. Schneller, William E. Moehle, Gangkai Zhao
  • Mineral Oils Containing Phenolic Antioxidants With Improved Color Stability
    Publication number: 20130281338
    Abstract: This invention relates to a mineral oil containing hindered phenolic antioxidants with improved color stability. More particularly, it relates to non-coloring hindered phenolic blend that contains an oxygen scavenger, i.e., dibenzylhydroxyl amine (DBHA) as well as mineral oils containing such a blend.
    Type: Application
    Filed: January 6, 2012
    Publication date: October 24, 2013
    Applicant: Albermarle Corporation
    Inventors: Bo Liu, Vince J. Gatto, Gangkai Zhao
  • ANTIOXIDANT BLENDS SUITABLE FOR USE IN BIODIESELS
    Publication number: 20110119989
    Abstract: This invention provides stabilized biodiesels comprising (1) biodiesel, such as fatty acid methyl ester (FAME), (2) mono- or bis-hindered phenolic derived from 2,6-di-tert-butylphenol, and (3) N,N?-di-substituted para-phenylene diamine. Also methods of stabilizing biodiesel are provided involving adding (2) and (3) to (1).
    Type: Application
    Filed: July 30, 2008
    Publication date: May 26, 2011
    Applicant: Albemarle Corporation
    Inventors: Emily R. Schneller, William E. Moehle, Gangkai Zhao
  • ANTIOXIDANT BLENDS FOR FATTY ACID METHYL ESTERS (BIODIESEL)
    Publication number: 20100107481
    Abstract: This invention provides stabilized biodiesels comprising (1) biodiesel, such as fatty acid methyl ester (FAME), (2) mono- or bis-hindered phenolic derived from 2,6-di-tert-butylphenol, and (3) N,N?-di-substituted para-phenylene diamine. Also methods of stabilizing biodiesel are provided involving adding (2) and (3) to (1).
    Type: Application
    Filed: March 13, 2008
    Publication date: May 6, 2010
    Applicant: Albemarie Corporation
    Inventors: Vincent J. Gatto, Gangkai Zhao, Emily Schneller
  • Method of Producing Disproportionated Rosin
    Publication number: 20080097062
    Abstract: This method relates to a method for the production of fully disproportionated rosin by treating rosin with sulfur and an alkylphenol sulfide compound of a particular structure.
    Type: Application
    Filed: February 9, 2005
    Publication date: April 24, 2008
    Applicant: ALBEMARLE CORPORATION
    Inventors: Gangkai Zhao, Todd Cooke