Patents by Inventor Kurt Kleischmann

Kurt Kleischmann 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).

  • Composite magnetic disk with Si and SiC substrate
    Patent number: 4598017
    Abstract: The invention relates to a composite magnetic disk for magnetic recording, which consists of an annular core of polymeric material to which is bonded at least one disk of reaction-bonded silicon carbide with a magnetic recording layer on its outer surface. After its processing, the SiSiC disk surface shows optimum planarity and smoothness so that it can be used as a magnetic disk substrate. Furthermore, the material has a low density and an extremely high specific modulus of elasticity so that numbers of revolution higher than obtainable with formerly known AlMg5 disk substrates can be reached.
    Type: Grant
    Filed: May 22, 1984
    Date of Patent: July 1, 1986
    Assignee: International Business Machines Corporation
    Inventors: Thomas Bayer, Holger Hinkel, Kurt Kleischmann, Ulrich Kuenzel, Rolf Schafer