Patents by Inventor Shawn Zhu

Shawn Zhu 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: 7776798
    Abstract: This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications. The quaternary ammonium salts of the present invention exhibit improved gelling characteristics.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: August 17, 2010
    Assignee: Akzo Nobel Surface Chemistry LLC
    Inventors: Shankar Subramanian, Cenk Burgazli, Yun-Peng Zhu, Shawn Zhu, Dave Feuerbacher
  • Publication number: 20100056375
    Abstract: The present invention generally relates to an aqueous herbicidal formulation that comprises at least one phenoxy acid herbicide or an agriculturally acceptable salt or derivative thereof, and an alkylamidopropyl dialkylamine surfactant adjuvant, wherein said surfactant adjuvant comprises at least one surfactant having the formula (I) wherein R is a straight or branched chain, saturated or unsaturated acyl group having 6-22 carbon atoms, n is 3, and Y and Y? are, independently, an alkyl group having 1-4 carbon atoms or (AO)sH, wherein AO is an alkyleneoxy group having 2-4 carbon atoms, and s is on average 1-10; provided that at least one of the groups Y and Y? is an alkyl group having 1-4 carbon atoms; or a salt thereof; or a quaternised derivative of (I) having the formula (II) wherein R is a straight or branched chain, saturated or unsaturated acyl group having from 6 to 22 carbon atoms; n is 3; Y and Y? are, independently, an alkyl group having 1-4 carbon atoms or (AO)sH, wherein AO is an alkyleneoxy group
    Type: Application
    Filed: December 3, 2007
    Publication date: March 4, 2010
    Applicant: Akzo Nobel N.V.
    Inventors: Claes Johan Markus Jönsson, Shawn Zhu
  • Publication number: 20100056376
    Abstract: The present invention relates to processes for preparation of alkoxylated alkyl amines or alkoxylated alkyl ether amines with peaked distribution, surfactants comprising alkoxylated alkyl amines or alkoxylated alkyl ether amines with peaked distribution, and stable herbicidal formulations comprising alkoxylated alkyl amines or alkoxylated alkyl ether amines with peaked distribution.
    Type: Application
    Filed: March 23, 2007
    Publication date: March 4, 2010
    Applicants: MONSANTO TECHNOLOGY LLC, AKZO NOBEL N.V.
    Inventors: Shawn Zhu, Giao Nguyen, Kha Nguyen, Alberto Slikta, David Eaton, David Becher, Henry Agbaje, Michael Seitz
  • Publication number: 20090305896
    Abstract: The present invention generally relates to a method for minimizing the formation of insoluble salts of phenoxy herbicides. The method comprises (1) mixing a compatibility agent, amine salts of phenoxy acid herbicides, and a chemical containing non-amine cations in a aqueous system to form a stable and non-nozzle plugging solution; and (2) application of said stable and non-nozzle plugging solution onto target plants.
    Type: Application
    Filed: March 30, 2007
    Publication date: December 10, 2009
    Applicant: Akzo Nobel N.V.
    Inventors: Jinxia Susan Sun, Shawn Zhu, Shuaib A. Khan
  • Publication number: 20090209425
    Abstract: The present invention relates to stable glyphosate formulations with improved efficacy by a highly effective alkoxylated alkylamine quaternary surfactant at a very low used level. The alkoxylated alkylamine quaternary surfactant is compatible in all salts of glyphosate formulations (including potassium and ammonium) EVEN AT VERY HIGH CONCENTRATION (470-600 g a.e./l).
    Type: Application
    Filed: September 23, 2005
    Publication date: August 20, 2009
    Applicant: MONSANTO TECHNOLOGY LLC
    Inventors: Shawn Zhu, William Abraham, John Hemminghaus
  • Publication number: 20080261814
    Abstract: The present invention generally relates to a process for preparing the alkoxylated alkylamines and/or alkyl ether amines. The process consists of three stages, and utilizes an alkali catalyst. The alkoxylated alkyl amines and alkoxylated alkyl ether amines prepared by the process possess the peaked distribution and contain less hazardous by-product.
    Type: Application
    Filed: September 23, 2005
    Publication date: October 23, 2008
    Applicants: MONSANTO TECHNOLOGY LLC, AKZO NOBEL N.V.
    Inventors: Shawn Zhu, Giao Nguyen, Kha Nguyen, Alberto Slikta, David Eaton, David Becher, Henry Agbaje, Michael Seitz
  • Patent number: 7358215
    Abstract: This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications. The quaternary ammonium salts of the present invention exhibit improved gelling characteristics.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: April 15, 2008
    Assignee: Akzo Nobel Surface Chemistry LLC
    Inventors: Shankar Subramanian, Cenk Burgazli, Yun-Peng Zhu, Shawn Zhu, Dave Feuerbacher
  • Publication number: 20070167332
    Abstract: This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications. The quaternary ammonium salts of the present invention exhibit improved gelling characteristics.
    Type: Application
    Filed: February 1, 2007
    Publication date: July 19, 2007
    Applicant: Akzo Nobel Surface Chemistry LLC
    Inventors: Shankar Subramanian, Cenk Burgazli, Yun-Peng Zhu, Shawn Zhu, Dave Feuerbacher
  • Publication number: 20020147127
    Abstract: A composition of matter is disclosed comprising a compound of the structural formula: 1
    Type: Application
    Filed: February 26, 2002
    Publication date: October 10, 2002
    Applicant: CROMPTON CORPORATION
    Inventors: Yun-Peng Zhu, Cenk R. Burgazli, Shawn Zhu, James Lyle Hazen
  • Patent number: 6451731
    Abstract: An emulsifiable pesticidal suspension concentrate composition is provided comprising (a) a pesticidally effective amount of a liquid pesticide of low solubility in water, for example a chloroacetamide herbicide such as acetochlor, (b) a pesticidally effective amount of a solid particulate pesticide, more particularly a salt-forming pesticide, for example a glyphosate herbicide, in solid particulate form, dispersed in the liquid pesticide, (c) a stabilizing amount of a suspension aid, (d) an emulsifying agent in an amount sufficient to emulsify the concentrate composition in a suitable volume of water to form a dilute sprayable composition, and (e) zero to an assay adjusting amount of an inert liquid in which the liquid pesticide is soluble or miscible. The concentrate composition is substantially non-aqueous. The liquid and solid pesticides are selected to be chemically compatible with each other.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: September 17, 2002
    Assignees: Monsanto Company, CK Witco Corporation
    Inventors: Henry E. Agbaje, Deborah H. Carter, Tracy A. Powers, Shannon K. Hawkins, Alan J. Stern, Shawn Zhu