Patents by Inventor Jean Olivier-Martin

Jean Olivier-Martin 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).

  • Concrete unit prestressed using tendons stressed before concreting, more particularly a railway sleeper
    Patent number: 4098460
    Abstract: A long concrete unit, prestressed by tendons tensioned before concreting, at least one section of which, near the end of the said unit, is submitted to maximum loads, characterized by the fact that at least one improved-bond prestressing tendon is surrounded by spirals located on either side of the zone of maximum tensile stress.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: July 4, 1978
    Assignee: Societe Technique pour l'Utilisation de la Precontrainte
    Inventor: Jean Olivier-Martin