Patents by Inventor Bernd Dreher

Bernd Dreher 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).

  • Prestressing elements coated with plastic material and process for making them
    Patent number: 4552815
    Abstract: Prestressing elements having a two-layer plastics covering, the inner layer being moldable, storage-stable at room temperature and thermally curable, and the outer layer consisting of a radiation-cured plastics material, are excellently suitable for producing supporting structural elements, particularly concrete supporting structures and rock bracings.
    Type: Grant
    Filed: September 22, 1983
    Date of Patent: November 12, 1985
    Assignee: Ciba Geigy Corporation
    Inventors: Bernd Dreher, Wolfgang Schneider