Patents by Inventor Douglas J. Ruckel

Douglas J. Ruckel 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).

  • Method for stabilizing an area of the earth's surface
    Patent number: H1237
    Abstract: A method for producing a stabilized area by positioning a plurality of heat transfer tubes on or below the surface of the stabilized area and flowing a coolant through the tubes to maintain a stabilized area in a frozen condition. Water may also be frozen over the stabilized area.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: October 5, 1993
    Inventors: Frank E. Lowther, Douglas J. Ruckel