Patents by Inventor Ridha Trabelsi

Ridha Trabelsi 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).

  • Alumina-based ceramic for sintering, method of manufacture and sliding parts obtained thereby
    Patent number: 5658838
    Abstract: The present invention relates to novel alumina-based ceramic composition containing a compound capable of forming a spinel-type aluminate phase detectable by x-ray diffraction, the composition having particular advantage for use as a water faucet seal.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: August 19, 1997
    Assignee: Norton Desmarquest Fine Ceramics
    Inventor: Ridha Trabelsi
  • Process and sliding components so obtained
    Patent number: 5652189
    Abstract: A ceramic composition for sintering into sliding parts contains:at least 90% by weight alumina,1.7% by weight to 2% by weight Mn.sub.3 O.sub.4,0.8% by weight to 1% by weight TiO.sub.2,0.5% by weight to 1.5% by weight SiO.sub.2,0.6% by weight to 1.2% by weight CoO,not more than 1% by weight MgO,not more than 0.4% by weight Fe.sub.2 O.sub.3,the remainder, up to 0.5% in total, comprising impurities.After sintering, this composition produces sliding parts containing manganese aluminate and/or cobalt aluminate phases.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 29, 1997
    Assignee: Norton Desmarquest Fine Ceramics
    Inventor: Ridha Trabelsi