Patents by Inventor Peter Heilmann

Peter Heilmann 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).

  • Process for the preparation of magnetic particle dispersions using ball mills and grinding media
    Patent number: 5085889
    Abstract: Magnetic recording media are produced by dispersion of powdered magnetic material in a mixture of solvents, organic polymer binders, dispersants and further conventional additives in a stirred ball mill and subsequent aftertreatment in a ball mill containing grinding media, application of the resulting dispersion as a layer to a substrate and subsequent consolidation of the layer.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: February 4, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Horst Platz, Peter Engelhardt, Friedrich Sommermann, Albert Kohl, Juergen Klausmann, Reinhold Baur, Peter Heilmann, Hermann Roller
  • Magnetic recording media with a dual protective coating of silicon monoxide and chromium
    Patent number: 4560624
    Abstract: Magnetic recording media possess, on a dimensionally stable base which may or may not be provided with a non-magnetic lower layer, a thin ferromagnetic metal layer on which a protective layer consisting of a silicon monoxide/chromium dual coating is applied.
    Type: Grant
    Filed: November 29, 1984
    Date of Patent: December 24, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Christine Guttner, Peter Heilmann, Udo Kullmann, Dieter Mayer, Werner Grau