Patents by Inventor Gerhard Schröder

Gerhard Schröder 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).

  • Stabilization of magnetite pigments with heterocyclic nitrogen compounds
    Patent number: 4264462
    Abstract: A finely divided magnetite pigment such as is used in magnetic tapes is stabilized against oxidation by contact with a heterocyclic nitrogen compound such as morpholine, triazole, piperazine or substitution products thereof. The heterocyclic compound can be applied as a solution or in vapor form.
    Type: Grant
    Filed: September 21, 1978
    Date of Patent: April 28, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunter Buxbaum, Bernd Stephan, Franz Hund, Gerhard Schroeder