Patents by Inventor Helmut Jakusch

Helmut Jakusch 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 of improved mechanical resistance
    Patent number: 4048375
    Abstract: Magnetic recording media consisting of a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on finely divided magnetic pigment dispersed in organic binders, which coating contains, according to the invention, salts of long-chain basic polyaminoamides with high molecular weight organic acid esters.Such magnetic recording media exhibit improved mechanical resistance and improved adhesion of the coating to the base, coupled with advantageous electromagnetic properties.
    Type: Grant
    Filed: July 26, 1976
    Date of Patent: September 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Gustav Loewenberg, Hans-Joerg Hartmann, Dieter Schaefer, Herbert Motz, Helmut Jakusch
  • Manufacture of gamma-iron (III) oxide
    Patent number: 4018882
    Abstract: A process for the manufacture of acicular magnetic gamma-iron(III) oxide by reducing acicular alpha-iron(III) oxide to magnetite and then oxidizing it to gamma-iron(III) oxide, wherein the alpha-iron(III) oxide is treated with a water-soluble alkaline earth metal compound and an alkylphenol with one to three alkyl radicals, each of 4 to 24 carbon atoms, on the benzene nucleus. Gamma-iron(III) oxides manufactured in this way show better magnetic orientability in the binder-containing dispersion, and a higher coercive force than prior art magnetic pigments.
    Type: Grant
    Filed: September 25, 1975
    Date of Patent: April 19, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Koester, Gerd Wunsch, Eduard Schoenafinger, Hans Henning Schneehage, Helmut Jakusch