Patents by Inventor Olaf Stitz

Olaf Stitz 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).

  • Method for coating carbon and graphite bodies
    Patent number: 4716572
    Abstract: Coating graphite and carbon bodies with a protective layer containing predominantly silicon, by plasma spraying a silicon powder with a grain size under 0.05 mm and with an argon/hydrogen mixture as the plasma gas at reduced atmospheric pressure of at most 200 h Ps. The layer thickness is 0.1 to 0.5 mm and has a density which is at least 95% of the theoretical density. The coated bodies, for instance, graphite electrodes have a lower burnoff rate than unprotected ones in an oxidizing or corrosive atmosphere.
    Type: Grant
    Filed: December 17, 1985
    Date of Patent: December 29, 1987
    Assignee: Sigri GmbH
    Inventors: Heinrich Kuhn, Olaf Stitz, Karl Wimmer