Patents by Inventor Nelson F. Goetz

Nelson F. Goetz 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).

  • High strength pipe
    Patent number: 4269234
    Abstract: A high strength pipe comprising a corrugated metallic tube defining a series of annular troughs therewithin and a resinous material lining the interior surface to fill the troughs and create a smooth and corrosion resistant surface.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: May 26, 1981
    Assignee: Tri State Culvert Corporation
    Inventors: Doyle F. Johnson, Nelson F. Goetz