Patents by Inventor Daniel F. Jahns

Daniel F. Jahns 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).

  • Pump-off monitor for rod pump wells
    Patent number: 4015469
    Abstract: An improved method for determining when a rod pumped well has pumped-off wherein the energy input to the polished rod is determined for a portion of the pump stroke and the variation in the computed energy input between pump strokes is used as an indication of the well pumping-off.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: April 5, 1977
    Assignee: Shell Oil Company
    Inventors: Fred A. Womack, Daniel F. Jahns