Patents by Inventor Kalus-Dieter Hoppe

Kalus-Dieter Hoppe 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).

  • Acicular, ferromagnetic metal particles essentially consisting of iron, and their preparation
    Patent number: 4960462
    Abstract: Acicular, ferromagnetic metal particles which essentially consist of iron and have a nickel content of not more than 0.4% by weight and high values for coercive force and magnetization, and a process for the preparation of these particles. The particles further include zinc, phosphorus in the form of phosphate ions, and silicon in the form of SiO.sub.2.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: October 2, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael W. Mueller, Kalus-Dieter Hoppe, Ekkehard Schwab, Werner Steck, Helmut Auweter, Rainer Feser