Patents by Inventor Harald Kunze

Harald Kunze 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).

  • Foamed thermoplastic leather and textile substitute material
    Patent number: 3984597
    Abstract: An unsupported leather or textile substitute in the form of a cellular porous unsupported sheets having:A. a thickness of 1 to 3 mm;B. a density of 0.25 to 0.60 g/cm.sup.3 ;C. an average cell diameter size of 60 to 200 microns;D. a tensile strength between 10 and 60 kg/cm.sup.2 ;E. a tear propagation strength between 4 and 10 kg/cm;F. a flexibility of 10 to 100 g . cmG. a water vapor permeability of 20 to 200 mg/1000 mm.sup.2.day;H. a scratch resistance with 0.8 kg load of at least 40 strokes.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: October 5, 1976
    Assignee: VEB Leuna-Werke "Walter Ulbricht"
    Inventors: Dieter Haack, Harald Kunze, Werner Lauterberg, Jochen Sander, Werner Taube, Peter Umbreit, Gerd Wilde