Patents by Inventor Susan D. Thompson

Susan D. Thompson 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).

  • Preparation of 5-acylamino-1,2,4-triazole-3-sulfonamides
    Patent number: 5391759
    Abstract: 5-Acylamino-1,2,4-triazole-3-sulfonamides, which are useful intermediates for the preparation of 1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide herbicides are prepared from 5-amino-3-mercapto-1,2,4-triazole by sequential acylation to 5-acylamino-3-mercapto-1,2,4-triazoles, chlorination to 5-acylamino-3-chlorosulfonyl-1,2,4-triazoles, and condensation with substituted anilines to 5-acylamino-1,2,4-triazole-3-sulfonamides. 5-Acylamino-3-chlorosulfonyl-1,2,4-triazole compounds are key intermediates in the process.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: February 21, 1995
    Assignee: DowElanco
    Inventors: Jack C. Little, Mark J. Costales, Ravi B. Shankar, R. Garth Pews, Kidisti G. Mariam, Susan D. Thompson
  • Preparation of 5-amino-1,2,4-triazole-3-sulfonamides
    Patent number: 5382674
    Abstract: 5-Amino-l,2,4-triazole-3-sulfonamides, which are intermediates for substituted 1,2,4-triazolo-[1,5-a]pyrimidine-2-sulfonamide herbicides are prepared in two steps from 5-amino-3-mercapto-1,2,4-triazole by chlorination in a medium containing an aqueous acid to obtain 5-amino-3-chlorosulfonyl-1,2,4-triazole and subsequent condensation of this intermediate with substituted anilines. The condensation reaction takes place either in the presence or absence of an acid scavenging base.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: January 17, 1995
    Assignee: DowElanco
    Inventors: Jack C. Little, Mariam G. Kidisti, Patricia A. Thibos, Susan D. Thompson
  • 5-amino-1,2,4-triazole-3-sulfonamides
    Patent number: 5359079
    Abstract: 5-Amino-1,2,4-triazole-3-sulfonamides, which are intermediates for substituted 1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide herbicides are prepared in two steps from 5-amino-3-mercapto-1,2,4-triazole by chlorination in a medium containing an aqueous acid to obtain 5-amino-3-chlorosulfonyl-1,2,4-triazole and subsequent condensation of this intermediate with substituted anilines. The condensation reaction takes place either in the presence or absence of an acid scavenging base.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: October 25, 1994
    Assignee: DowElanco
    Inventors: Jack C. Little, Patricia A. Thibos, Mariam G. Kidisti, Susan D. Thompson