Patents by Inventor Bernhard Bottcher

Bernhard Bottcher 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).

  • Preparation of stabilized acicular ferromagnetic chromium dioxide
    Patent number: 5164173
    Abstract: Stabilized acicular ferromagnetic chromium dioxide is prepared by a method in which the chromium dioxide surface formed as a result of a reductive treatment is treated with adsorbed monobasic or polybasic hydroxycarboxylic acids.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: November 17, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Muller, Manfred Ohlinger, Rainer Feser, Bernhard Bottcher, Peter Rudolf, Werner Hubner