Patents by Inventor Duane R. Hampton

Duane R. Hampton 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 and apparatus for subterranean liquid level measurement
    Patent number: 5048334
    Abstract: A method and an apparatus for determining the thickness of a layer of a first liquid above an interface formed by the first liquid and the second liquid underlying the first liquid in a subterranean formation. The apparatus includes an elongated metal rod having a sharpened distal end. An electrode is provided adjacent the sharpened distal end to indicate when the interface formed by the two liquids has been reached. A lengthwise running elongated slot is provided in the outer surface of the body of the metal rod and contains an indicator strip. The indicator strip is adapted to undergo a color change upon contact with the first liquid. By measuring the length of the indicator strip which has undergone a color change, the thickness of the layer of the first liquid can be determined.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: September 17, 1991
    Assignee: The Board of Trustees of Western Michigan University
    Inventors: Duane R. Hampton, Ross Wagner, James Howell