Patents by Inventor Gunter Kimpel

Gunter Kimpel 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).

  • Thermoplastic eraser
    Patent number: 4350787
    Abstract: An eraser composed of conventional fillers and additives and, in addition, a binder of a styrene-isoprene-styrene block copolymer. The eraser composition does not require any aftertreatment, e.g., vulcanization, and can be fabricated into erasers utilizing single equipment.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: September 21, 1982
    Assignee: J. S. Staedtler
    Inventor: Gunter Kimpel