Patents by Inventor Friedrich W. Guthe

Friedrich W. Guthe 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).

  • Plastic wheel assembly
    Patent number: 4896922
    Abstract: A wheel assembly has a rim body made from injection-moldable plastic. A tire is applied to the plastic rim which tire consists of thermoplastic rubber. For achieving a high resistance to heat and fire without impairing the cohesion between such materials, the body or rim consists of a halogen-free polypropylene copolymer and the tire consists of a polypropylene vulcanized cross-linked with an EPDM rubber.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: January 30, 1990
    Assignee: Tente Rollen Gesellschaft mit beschrankter Haftung & Co.
    Inventor: Friedrich W. Guthe