Patents by Inventor Herman Seifert

Herman Seifert 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).

  • Process for producing 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole using methyldithiocarbazinate and trifluoroacetic acid
    Patent number: 5905157
    Abstract: The present invention provides a process of making 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole. The process includes the steps of (a) reacting methyldithiocarbazinate with a molar excess of trifluoroacetic acid; and (b) removing the water and excess trifluoroacetic acid. Water and excess trifluoroacetic acid are preferably removed via distillation.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: May 18, 1999
    Assignees: Bayer Corporation, Bayer Aktiengesellschaft
    Inventors: Vijay C. Desai, Peter E. Newallis, Vidyanatha A. Prasad, Herman Seifert