Patents by Inventor Gerhard Specht

Gerhard Specht 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).

  • Patent number: 4572848
    Abstract: Silicon-infiltrated, reaction-bonded silicon carbide molded bodies for application in machine building are produced by means of a siliconizing apparatus, comprising a graphite plate coated with boron nitride, a porous silicon carbide plate coated with a layer of boron nitride, silicon carbide and carbon and a layer of lumpy metallic silicon inserted between the two plates. Furthermore, following the heating and solidification of the liquid silicon, wherein due to the increase in volume of the silicon, beads of silicon appear at the surface of the molded body, these may be easily removed when the infiltrated silicon carbide molded bodies are cooled in a nitrogen atmosphere.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: February 25, 1986
    Assignee: Hoechst CeramTec Aktiengesellschaft
    Inventors: Werner Pollak, Michael Blecha, Gerhard Specht