Patents by Inventor Ilmer I. Niemi

Ilmer I. Niemi 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).

  • Ballasted floating barrier boom
    Patent number: 4129989
    Abstract: A floating ballasted oil containment boom provides a stable continuous barrier to the passage of petroleum or other contaminants floating on the surface of water. Boom elements are connected end to end by an overlapping joint.
    Type: Grant
    Filed: April 19, 1977
    Date of Patent: December 19, 1978
    Assignee: Conwed Corporation
    Inventors: Ilmer I. Niemi, Kenneth S. Peterson