Patents by Inventor Benno Hoffmann

Benno Hoffmann 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).

  • Heat-insulating panel
    Patent number: 4426818
    Abstract: Rectangular heat-insulating panels of a semi-rigid foam plastic, in particular a foam produced from polystyrene beads, are provided on both sides with a plurality of incisions which run at right angles to the principal plane of the panel and parallel to one end face. The four end faces each have matching tongue and groove profiles. The insulating panels may be used for the heat insulation of parts of buildings, especially of pitched roofs.
    Type: Grant
    Filed: November 6, 1980
    Date of Patent: January 24, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Benno Hoffmann