Patents by Inventor Pierre Barthel

Pierre Barthel 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).

  • Elongated elements of pre-stressed concrete, adapted to be assembled end to end
    Patent number: 4504174
    Abstract: The present invention relates to elongated elements of concrete pre-stressed by tensioned reinforcements adherent to this concrete. Each element comprises a box capping its end to which the reinforcements are fixed and which is provided with a flange allowing tensioning of the reinforcements and the possible assembly of two elements end to end. The invention is applicable to all structures formed by elements pre-stressed by adherent reinforcements, and in particular to driven-in piles.
    Type: Grant
    Filed: January 4, 1983
    Date of Patent: March 12, 1985
    Assignee: Freyssinet International (STUP)
    Inventor: Pierre Barthel