Patents by Inventor Wolfgang P. Iwanzik

Wolfgang P. Iwanzik 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).

  • Synergistic composition and method of selective weed control
    Patent number: 5296449
    Abstract: Herbicidal composition comprising 5-(2,4,6-trimethylphenyl)-2-[1-(ethoximino)propionyl]-cyclohexane-1,3-dion e of formula I ##STR1## and a synergistically effective amount of either 2-[4-(5-chloro-3-fluoropyridin-2-yloxy)phenoxy]-propionic acid propynyl ester of formula II ##STR2## or (.+-.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: March 22, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Patrick Ryan, Urs Hofer, Richard Istead, Hans Gut, Wolfgang P. Iwanzik
  • Herbicidal composition
    Patent number: 5006161
    Abstract: Herbicidal compositions in the form of microcapsules are described which microcapsules have a capsule wall of polyurea and encapsulate a herbicidally active N-chloroacetylcyclohexeneamine or a mixture of a herbicidally active N-chloroacetylcyclohexeneamine and a herbicidally active chloroacetanilide.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: April 9, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: Hans W. Hasslin, Wolfgang P. Iwanzik