Patents Assigned to VAW silizium GmbH
  • Spherical metal-oxide powder particles and process for their manufacture
    Patent number: 5856254
    Abstract: Spherical metal-oxide powder particles are used as finely ground raw and filler materials in mineral, ceramic and refractory construction, technical and auxiliary materials, as well as for polishing and grinding agents. There is a process for producing the powder particles, and there is a process for treating ceramic and refractory residual materials.
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: January 5, 1999
    Assignee: VAW silizium GmbH
    Inventors: Reinhard Feige, Friedhelm Bramsiepe