Patents by Inventor Steven D. Hanson

Steven D. Hanson 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).

  • Barrier for utility pole
    Patent number: 4799340
    Abstract: An enclosure constituting a barrier for a buried segment of a pole to prevent leaching of pole preservatives into the ground. Pliable sheet material is formed into a tubular sheath by means of a lengthwise seam. A closure is formed at the lower end of the sheath by folding and a thermal weld. A band at the barrier upper end may be shrunk to close the barrier snugly about the pole.
    Type: Grant
    Filed: November 3, 1986
    Date of Patent: January 24, 1989
    Assignees: James W. Lichau, Patricia K. Lichau
    Inventors: James W. Lichau, Patricia K. Lichau, Steven D. Hanson