Patents by Inventor Friedhelm Bramsiepe

Friedhelm Bramsiepe 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).

  • Process for producing spherical metal-oxide powder particles
    Patent number: 5994252
    Abstract: There is a process for producing spherical metal-oxide powder particles. They 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.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: November 30, 1999
    Assignee: RW silicium GmbH
    Inventors: Reinhard Feige, Friedhelm Bramsiepe
  • 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