Patents by Inventor Helfried Hahne

Helfried Hahne 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).

  • Self-supporting facade component in sandwich construction
    Patent number: 5351454
    Abstract: A self-supporting facade component in sandwich construction, composed of at least two self-supporting layers and at least one interposed insulating layer, is metal-free, the self-supporting layers being composed of fiber-reinforced concrete and the layers being positively fixed to one another by non-metallic fixing means (preferably plastic anchors).
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: October 4, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helfried Hahne, Johann-Dietrich Worner