Patents by Inventor Gerald E. Kollman

Gerald E. Kollman 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 herbicidal compositions
    Patent number: 4198227
    Abstract: Herbicidal compositions which comprise (A) 2,3,6-trichlorophenylacetic acid (fenac), or a salt, ester, or amide thereof, and (B) a diphenyl ether herbicide, exhibit synergistic activity in the control of weeds, and particularly in the control of nutsedge species.
    Type: Grant
    Filed: February 5, 1975
    Date of Patent: April 15, 1980
    Assignee: Rohm and Haas Company
    Inventors: Gerald E. Kollman, Elwood N. Irwin
  • Selective herbicidal activity of fluoroaminopyridazines
    Patent number: 4083713
    Abstract: This invention relates to the selective herbicidal activity of fluoroaminopyridazines. In particular, these compounds exhibit preemergence and postemergence herbicidal activity on many of the major weeds including perennial weeds such as nutsedge and quackgrass. These compounds are particularly effective in selectively controlling weeds in agronomic crops.
    Type: Grant
    Filed: March 14, 1975
    Date of Patent: April 11, 1978
    Assignee: Rohm and Haas Company
    Inventors: Roy Y. Yih, Wayne O. Johnson, Gerald E. Kollman