Patents by Inventor Earl W. Smith

Earl W. Smith 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 leakage measurement
    Patent number: 4300388
    Abstract: A method of high sensitivity for measuring leakage of liquid from a storage tank which comprises introducing a sensor into the liquid in the tank, the sensor being coupled to means for sensing displacement of mass, measuring the displacement over a known period of time and calculating the leakage rate. The sensor is designed to compensate for evaporative losses and temperature changes.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: November 17, 1981
    Assignee: Sun Oil Company of Pennsylvania
    Inventors: William B. Hansel, Earl W. Smith
  • Method for leakage measurement
    Patent number: RE31884
    Abstract: A method of high sensitivity for measuring leakage of liquid from a storage tank which comprises introducing a sensor into the liquid in the tank, the sensor being coupled to means for sensing displacement of mass, measuring the displacement over a known period of time and calculating the leakage rate. The sensor is designed to compensate for evaporative losses and temperature changes.
    Type: Grant
    Filed: August 5, 1982
    Date of Patent: May 14, 1985
    Assignee: Hunter Environmental Services, Inc.
    Inventors: William B. Hansel, Earl W. Smith