Patents by Inventor Alfred VAN Tilburg

Alfred VAN Tilburg 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).

  • Apparatus for inspecting a pipeline for leaks
    Patent number: 4172379
    Abstract: A method and apparatus for automatically adjusting the gain of an ultrasonic device for inspecting a pipeline for leaks. The ultrasonic device is designed to pass through the interior of a pipeline and record noise produced by fluids leaking from the pipeline. The response of the device is adjusted automatically by controlling the gain of the amplification in response to the strength of a signal received from an ultrasonic generator positioned outside the pipeline.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: October 30, 1979
    Assignee: Shell Oil Company
    Inventors: Alfred VAN Tilburg, Robert C. Lohman
  • Process and apparatus for investigating the activity of a cathodic protection unit
    Patent number: 4090170
    Abstract: A method and apparatus for remotely measuring the cathodic protection level on a cathodically protected structure. The method uses a remote apparatus to measure the cathodic protection level and convert it to a related acoustic signal that is transmitted via the structure or surrounding media to a conveniently located receiving location.
    Type: Grant
    Filed: November 11, 1976
    Date of Patent: May 16, 1978
    Assignee: Shell Oil Company
    Inventors: Jan Lincklaen-Arriens, Alfred VAN Tilburg, Teunis L. VAN Waart