Patents Assigned to Vereinigte Schmirgel-und Maschinenfabriken Aktiengesellschaft
  • Granular abrasive material
    Patent number: 5259147
    Abstract: A granular abrasive material is produced from a dispersion consisting of raw materials containing alumina, compounds containing silica and other additives. The dispersion is ground to a sinterable slip with a grain size of less than 1 micrometer. The slip is dried and may be pressed before being subjected to a multi-stage heating process to produce sintered corundum crystals.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: November 9, 1993
    Assignee: Vereinigte Schmirgel-und Maschinenfabriken Aktiengesellschaft
    Inventors: Wolfgang Falz, Gunter Bigorajski, Herbert Exner