Patents by Inventor Hellmut Hoffman

Hellmut Hoffman 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).

  • Pesticidally active N-(alkoxy-alkylthio-thiophosphoryl)-N-substituted-N-arylthio-formamidine s
    Patent number: 4172131
    Abstract: N-(Alkoxy-alkylthio-thiophosphoryl)-N'-substituted-N'-arylthio-formamidines of the formula ##STR1## IN WHICH R and R.sup.1 each independently is alkyl,R.sup.2 is alkyl, cycloalkyl or alkenyl, andAryl is phenyl or phenyl substituted by at least one of alkyl and halogen,Which possess arthropodicidal and nematicidal properties.
    Type: Grant
    Filed: February 23, 1978
    Date of Patent: October 23, 1979
    Assignee: Bayer Aktiengesellchaft
    Inventors: Hellmut Hoffman, Bernhard Homeyer, Ingeborg Hammann