Patents by Inventor Audrey Y. Ku

Audrey Y. Ku 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).

  • Substituted benzotrifluoride compounds as chemical intermediates and a process for their preparation
    Patent number: 4532353
    Abstract: This invention pertains to two substituted benzotrifluoride compounds useful as chemical intermediates for a new class of 2-haloacetanilide herbicides and a process for making these intermediates. The process generally involves nitration and reduction of the corresponding benzotrifluoride compound.
    Type: Grant
    Filed: June 16, 1983
    Date of Patent: July 30, 1985
    Assignee: Monsanto Co.
    Inventors: John P. Chupp, Audrey Y. Ku, Thomas E. Neumann, Thomas E. Nickson
  • Preparation of 2-(methylthiomethyl)-6-(trifluoromethyl)aniline from ortho-aminobenzotrifluoride
    Patent number: 4496765
    Abstract: This invention relates to a process for the preparation of 2-(methylthiomethyl)-6-(trifluoromethyl) aniline, [MTA], from ortho-aminobenzotrifluoride, (OABT), employing a single solvent transformation via a sulfilimine intermediate. A sulfilimine hydrochloride salt is prepared by the oxidative addition of dimethyl sulfide to OABT in the presence of N-chlorosuccinimide. Neutralization of the sulfilimine hydrochloride salt with aqueous sodium hydroxide followed by phase separation results in an organic phase containing free sulfilimine and an aqueous phase generally containing succinimide and/or sodium succinimide. In a preferred embodiment the phase separation is performed in such a manner to leave a catalytic amount of succinimide in the organic phase. The free sulfilimine catalytically rearranges at moderate temperatures in the presence of this succinimide catalyst to form MTA.
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: January 29, 1985
    Assignee: Monsanto Company
    Inventors: Audrey Y. Ku, John P. Chupp, Terry M. Balthazor
  • Preparation of ortho-(alkylthiomethyl) anilines by catalytic sulfilimine rearrangement
    Patent number: 4480130
    Abstract: This invention relates to a process for preparing ortho-(alkylthiomethyl) anilines by catalytic rearrangement of aromatic sulfilimines in an inert organic solvent. The sulfilimine can be prepared using any of the procedures available in the art. This invention particularly relates to a new class of sulfilimine rearrangement catalysts.
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: October 30, 1984
    Assignee: Monsanto Company
    Inventor: Audrey Y. Ku
  • Reinforcement promoters for filled thermoplastic polymers
    Patent number: 4385136
    Abstract: A reinforced, filled thermoplastic polymer composition, having increased strength and ductility, contains a reinforcement promoter having at least two reactive olefinic double bonds and a positive promoter index, based on the double bond resonance and polarity, and the promoter adsorptivity.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: May 24, 1983
    Assignee: Union Carbide Corporation
    Inventors: Fred H. Ancker, Arnold C. Ashcraft, Jr., Martin S. Leung, Audrey Y. Ku
  • Reinforcement promoters for filled thermoplastic polymers
    Patent number: RE31992
    Abstract: A reinforced, filled thermoplastic polymer composition, having increased strength and ductility, contains a reinforcement promoter having at least two reactive olefinic double bonds and a positive promoter index, based on the double bond resonance and polarity, and the promoter adsorptivity.
    Type: Grant
    Filed: November 29, 1983
    Date of Patent: September 24, 1985
    Assignee: Union Carbide Corporation
    Inventors: Fred H. Ancker, Arnold C. Ashcraft, Jr., Martin S. Leung, Audrey Y. Ku