Patents by Inventor Willi Mildenberger

Willi Mildenberger 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).

  • Shoe bottom
    Patent number: 4228600
    Abstract: A shoe bottom comprising a flexible foam having at least one surface with open or opened cells, and a film of an elastomeric material covering the open or opened cells of said surface. Advantageously the foam is an initially flexible closed-cell crosslinked polyolefin foam and the film is an elastomeric polyurethane of a thickness of about 0.1 to 0.3 mm.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: October 21, 1980
    Assignee: Firma Carl Freudenberg
    Inventors: Hans-Dietrich Krug, Willi Mildenberger