Patents by Inventor Eerhard Koester

Eerhard Koester 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).

  • Magnetic recording media
    Patent number: 4656093
    Abstract: Magnetic recording media consisting of a non-magnetic base and, applied thereto, one or more firmly adhering magnetizable layers based on magnetic material finely dispersed in a polymeric binder, at least one lubricant and other conventional additives, wherein the lubricant used is a mixture of zinc stearate which has been rendered hydrophilic and stearylamide.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: April 7, 1987
    Assignee: Basf Aktiengesellschaft
    Inventors: August Lehner, Albert Kohl, Hermann Roller, Werner Balz, Eerhard Koester, Friedrich Sommermann