Patents by Inventor Hans-Dietrich Krug

Hans-Dietrich Krug 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).

  • Sheet for the manufacture of cushioned insoles
    Patent number: 4263727
    Abstract: In a sheet for the manufacture of cushioned insoles or of inner soles comprising a substrate and a foamed plastic layer the improvement wherein said substrate comprises a bonded fibrous web flame laminated to the foamed plastic layer which comprises a closed-cell crosslinked polyolefin foam. Advantageously a woven covering layer is flame laminated to the opposite surface of the polyolefin foam which comprises polyethylene and has a density of about 25 to 200 kg/m.sup.3 and a thickness of about 1.5 to 15 mm.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: April 28, 1981
    Assignee: Firma Carl Freudenberg
    Inventors: Heinz Bender, Hans-Dietrich Krug, Klaus Heckel
  • 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
  • Multilayer plate
    Patent number: 4161561
    Abstract: A multilayer plate which is capable of being drawn comprises a central foam sheet of a closed cell, cross-linked polyolefin, the surfaces of which are covered with the same or different sheets of a hard material capable of being drawn.
    Type: Grant
    Filed: February 23, 1978
    Date of Patent: July 17, 1979
    Assignee: Firma Carl Freudenberg
    Inventor: Hans-Dietrich Krug
  • Shoe insert
    Patent number: 4130948
    Abstract: A shoe having a multi-layered insert disposed in said shoe against the shoe sole, said insert formed of a closed-cell, cross linked polyolefin foam, said insert having zones of different resiliency.
    Type: Grant
    Filed: August 25, 1977
    Date of Patent: December 26, 1978
    Assignee: Firma Carl Freudenberg
    Inventor: Hans-Dietrich Krug