Patents by Inventor Rainer Koppler

Rainer Koppler 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).

  • Method for the manufacture of SiO.sub.2 granular material
    Patent number: 5979186
    Abstract: A method is provided for the manufacture of SiO.sub.2 granular material. Silicic acid is dispersed in a liquid to form a dispersion. The dispersion is stirred in a stirring tank with formation of a homogeneous liquid phase. The homogeneous liquid phase is maintained by stirring at a substantially constant rate until the granular mass develops, when the solids content of the dispersion is within the range of 65 to 80 weight percent. Moisture is gradually extracted to form a granular mass which is dried and sintered.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: November 9, 1999
    Assignee: Heraeus Quarzglas GmbH
    Inventors: Rainer Koppler, Fritz-Ulrich Kreis, Klaus Arnold