Patents by Inventor Horst Grosselfinger

Horst Grosselfinger 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).

  • Flexible multi-layer magnetic recording media
    Patent number: 4109046
    Abstract: Flexible multi-layer magnetic recording media comprising a non-magnetic flexible base and, applied thereto, two superposed magnetizable layers which contain a homogeneous mixture of acicular magnetic chromium dioxide in an organic binder.According to the invention, the magnetizable layer adjacent to the base contains a chromium dioxide having a specific surface area, measured by the BET method, of from 15 to 25 m.sup.2 /g, while the outer magnetic layer contains a chromium dioxide having a specific surface area, measured by the BET method, of from 26 to 35 m.sup.2 /g.Such magnetic recording media are distinguished by uniformly high sensitivity over the entire audible frequency range even if close manufacturing tolerances are not maintained.
    Type: Grant
    Filed: December 3, 1976
    Date of Patent: August 22, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz Hammon, Manfred Ohlinger, Horst Grosselfinger, Heinz Stritzinger, Job-Werner Hartmann, Eduard Schoenafinger, Walter Schneider