Patents by Inventor Hans Graefe

Hans Graefe 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).

  • Airbag and fabric for manufacturing same
    Patent number: 5554424
    Abstract: To manufacture airbags comprising a contact fabric and/or a filter fabric it is proposed to use hollow fiber synthetic filament yarns having a hollow area fraction of 10-40%, based on the total cross-sectional area of the fiber. The closeness values are >72% for the contact fabric and 45-68% for the filter fabric. In addition to reducing the production costs, hollow fibers also make it possible to produce lighter fabrics. These have a beneficial effect on the working of an airbag.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: September 10, 1996
    Assignee: Akzo Nobel, N.V.
    Inventors: Wolf R. Krummheuer, Volker Siejak, Hans Graefe