Patents by Inventor Ingomar Krehen

Ingomar Krehen 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).

  • Benzoyl(thio)urea arthropodicides
    Patent number: 4782091
    Abstract: Arthropodicidally active novel benzoyl(thio)ureas of the formula ##STR1## in which X is oxygen or sulphur,R.sup.1 is halogen andR.sup.2 is halogen.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: November 1, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wilhelm Sirrenberg, Benedikt Becker, Wolfgang Behrenz, Ingomar Krehen, Wilhelm Stendel