Patents by Inventor Kurt Benz

Kurt Benz 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: 6252069
    Abstract: A process for preparing 3-isopropyl-1H-2,1,3-benzothiadiazin-4 (3H)-one 2,2-dioxide (I) or a salt of I which comprises reacting anthranilic isopropylamide II simultaneously with sulfur trioxide or chlorosulfonic acid in the presence of an organic base or with adducts of sulfur trioxide and organic bases and phosphorus oxychloride at from 50° C. to the reflux temperature, followed, if appropriate, by conversion into its salts, is described.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: June 26, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Rupert Merkle, Otto Wörz, Erich Fretschner, Hanspeter Hansen, Albrecht Müller, Kurt Benz