Patents by Inventor Paul B. Sangster

Paul B. Sangster 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).

  • Patent number: 3972648
    Abstract: A controller and monitor for a fluid producing well is disclosed which operates on the principle that a transducable signal from a positive displacement meter is utilized to continually reset a time delay device which provides for continuing operation of said well so long as said transducable signal indicative of said well having produced a predetermined quantity of output as measured by said positive displacement meter is received by said time delay device prior to the expiration of a predetermined time interval established within said time delay device.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: August 3, 1976
    Inventor: Paul B. Sangster