Patents by Inventor Fister Dietmar

Fister Dietmar 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).

  • Colored corundum composite and processes for its production and its use
    Patent number: 5256611
    Abstract: Colored corundum composite with a matrix of .alpha.-Al.sub.2 O.sub.3, as formed by sol-gel process ending in sintering and size reduction steps with addition of oxide pigments (or precursors of such oxide pigments, formable to the oxide pigment in sinter heating) added to the sol before full gelation thereof.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: October 26, 1993
    Assignee: H. C. Starck GmbH & Co. KG
    Inventors: Paul Moltgen, Gerhard Winter, Fister Dietmar