Patents by Inventor Birger N. Nilsson

Birger N. Nilsson 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).

  • Packing material that can be shaped under the effect of heat
    Patent number: 4039362
    Abstract: A foamed plastic material of polyethylene or polystyrene capable of being heat-shaped for use in making packing containers wherein by stretching of the foam the cells therein are given a lenticular or elongated structure. In the case of a lenticular cell structure, produced by a bi-axial stretching operation, the individual cells are situated in layers in parallel planes. In the case of an elongated cell structure, produced by a mono-axial stretching operation, the individual cells are situated with their longitudinal axes in parallel planes.
    Type: Grant
    Filed: June 14, 1974
    Date of Patent: August 2, 1977
    Assignee: AB Ziristor
    Inventors: Georg E. Ernstsson, Birger N. Nilsson, Herwig Pupp, Olof S. Stark