Patents by Inventor Tor Frederick Larson

Tor Frederick Larson 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).

  • Spacerless or geocomposite double bottom for storage tank
    Patent number: 7344046
    Abstract: A spacerless double bottom apparatus for a storage tank having a metal bottom and upwardly extending metal sidewalls. The apparatus includes a first lining layer of flexible plastic on top of the metal bottom. A plastic grid having a plurality of openings therethrough is installed on top of the first lining layer. At least one layer of fiber insulation is installed and resides on top of the grid. An upper metal bottom on top of the fiber insulation is welded to the sidewalls to form a fluid tight secondary containment compartment.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: March 18, 2008
    Assignee: Matrix Service, Inc.
    Inventors: Tor Frederick Larson, Kenneth Leland Erdmann