Patents by Inventor Robert G. Stapleton

Robert G. Stapleton 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).

  • Determining saturation and permeability using mercury capillary pressure curves
    Patent number: 4625544
    Abstract: A method using mercury capillary pressure curves for determining various characteristics of formations. The mercury capillary pressure curve is amplified and small changes are used to compute residual saturation, permeability, Archie's exponent m and the resistivity factor F of the formation.
    Type: Grant
    Filed: January 29, 1986
    Date of Patent: December 2, 1986
    Assignee: Shell Oil Company
    Inventors: Herbert Hi-Hwa Yuan, Benjamin F. Swanson, Robert G. Stapleton
  • Centrifugal analyzer
    Patent number: 4567373
    Abstract: A centrifugal analyzer comprising a container adapted for holding a sample, a centrifuge having a rotor which holds the container, a source of electromagnetic energy and an array of photodiode means. The source is positioned such that at least a portion of the electromagnetic energy provided thereby impinges on the container, and the array of photodiode means is positioned such that at least a portion of the electromagnetic energy that impinges on the container is sensed by the array.
    Type: Grant
    Filed: October 20, 1982
    Date of Patent: January 28, 1986
    Assignee: Shell Oil Company
    Inventors: Joseph D. O'Meara, Jr., Herbert H. Yuan, William O. Lease, Robert G. Stapleton
  • Ultrasonic sensor
    Patent number: 4212201
    Abstract: A method and apparatus for identifying the fluid in a vessel, such as, a storage tank or pipeline using ultrasonic techniques. The method uses a transducer to project ultrasonic energy through the vessel and a second transducer positioned opposite the first to receive the energy that has been transmitted through the vessel and fluid. The transducers are included in a circuit whose parameters are adjusted to cause the circuit to resonate with the magnitude of the adjusted parameter being related to the fluid in the vessel.
    Type: Grant
    Filed: August 23, 1978
    Date of Patent: July 15, 1980
    Assignee: Shell Oil Company
    Inventors: John M. Hirsch, Robert G. Stapleton