Patents by Inventor Werner Toepfl

Werner Toepfl 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).

  • Thiolcarbamates for combating undesired plant growth
    Patent number: 4029687
    Abstract: N-alkyl-N-alkenyl-S-benzyl-thiolcarbamates have been found to be very effective weed killers. They may be used without a carrier or in the form of herbicidal compositions preferably for combating grasslike weeds in rice cultures.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: June 14, 1977
    Assignee: Ciba-Geigy AG
    Inventor: Werner Toepfl
  • Thiolcarbamates for combating undesired plant growth
    Patent number: 4004914
    Abstract: N-alkyl-N-alkenyl-S-benzyl-thiolcarbamates have been found to be very effective weed killers. They may be used without a carrier or in the form of herbicidal compositions preferably for combating grasslike weeds in rice cultures.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: January 25, 1977
    Assignee: Ciba-Geigy AG
    Inventor: Werner Toepfl
  • Dithiophosphates and their use as herbicides
    Patent number: 3942971
    Abstract: New dithiophosphates of the formula I ##EQU1## AND THEIR USE AS HERBICIDES ARE DISCLOSED. In formula I R.sub.1 and R.sub.2 are identical or different and each represents an alkyl or alkenyl or alkoxyalkyl radical with 1 to 5 carbon atoms, --CO--Am is an amide and Am is a piperidyl radical substituted by methyl or ethyl.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: March 9, 1976
    Assignee: Ciba-Geigy AG
    Inventor: Werner Toepfl