Patents by Inventor Gabriele Steinborn

Gabriele Steinborn 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).

  • Joint endoprosthesis with Al.sub.2 O.sub.3 ceramic head and a composite socket and process for making it
    Patent number: 5338771
    Abstract: A composite socket of a joint endoprosthesis may be fashioned in which the inorganic component of the socket has apatite and/or wollastonite crystalline phases and additionally secondary crystalline phases providing improved hydrolysis stability. The inorganic mixture consists (in mass % proportions) of 31-34% CaO, 10-12% P.sub.2 O.sub.5, 43-46% SiO.sub.2, 3-5% Na.sub.2 O, 2-3% CaF.sub.2 and, beyond the 100% of the above components, also 0.5-11% Al.sub.2 O.sub.3 and/or Zr.sub.2 and Al.sub.2 O.sub.3 or TiO.sub.2 and ZrO.sub.2 or TiO.sub.2 and ZrO.sub.2 and Al.sub.2 O.sub.3, whereby the proportion of TiO.sub.2 lies between 0.5 and 5%. Essential to the invention, too, is a certain grain size distribution and radius of aperture between the ball and the socket. The result is non-wearing operation of the endoprosthesis.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: August 16, 1994
    Assignee: Eska Medical Luebeck Medizin Technik GmbH
    Inventors: Gerd Neumann, Peter Hutschenreuther, Willfried Glien, Dagmar Raab, Barbara Leuner, Gabriele Steinborn, Georg Berger