Patents by Inventor Richard Istead

Richard Istead 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: 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