Patents by Inventor Dirk Marinus Van Aartrijk

Dirk Marinus Van Aartrijk 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 and device for detecting and locating irregularities in a dielectric
    Patent number: 6366095
    Abstract: The invention relates to a method for detecting at least one irregularity in the dielectric around a substantially elongate conductor, comprising of: applying a potential difference between the conductor and the earth; measuring at a first position voltage changes caused by said irregularity and moving in the direction of the first position; measuring at a second position voltage changes caused by said irregularity and moving in the direction of the second position; determining with the use of time registration the difference in arrival time of voltage changes caused by the same irregularity and measured at the first and second position; determining the position of the irregularity in said conductor on the basis of the, difference in arrival time and the length of said conductor between the first and second position.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: April 2, 2002
    Assignee: N.V. Kema
    Inventor: Dirk Marinus Van Aartrijk