Patents by Inventor Ludwig Pfaffenbauer

Ludwig Pfaffenbauer 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).

  • Firing kiln, especially a vacuum firing kiln for dental ceramic purposes
    Patent number: 4139341
    Abstract: A firing kiln, especially for use as a vacuum firing kiln for dental ceramic purposes, having a lower portion having a fixed firing platform, an upper portion raisable from the lower portion and in abutting relationship therewith, the lower portion having a hollow firing chamber in facing relationship with a fixed firing platform. The firing chamber includes means for emitting heat into the hollow chamber and toward the fixed firing platform, the surface of the fixed firing platform being at or above the level of the upper edge of the lower portion.
    Type: Grant
    Filed: July 20, 1976
    Date of Patent: February 13, 1979
    Assignee: Etablissement Dentaire Ivoclar
    Inventor: Ludwig Pfaffenbauer