Patents by Inventor Hans-Jurgen Comans

Hans-Jurgen Comans 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).

  • Ceramic sliding element with aluminum oxide and silicon nitride members
    Patent number: 4728582
    Abstract: In a sliding element having first and second members in friction and/or sealing contact, the first member s made by sintering a ceramic mixture based on silicon nitride, the content of the silicon nitride phase and/or of the silicon nitride mixed crystal phase being at least 60 weight-percent and the second counter-element member being formed of a ceramic material based on aluminum oxide.
    Type: Grant
    Filed: August 5, 1986
    Date of Patent: March 1, 1988
    Assignee: Feldmuehle Aktiengesellschaft
    Inventors: Hans-Jurgen Comans, Ulrich Krohn, Hans Jud, Hans-Gerd Rittel