Patents by Inventor Bernd Haack

Bernd Haack 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).

  • High-purity silica powder, and process and apparatus for producing it
    Publication number: 20050129603
    Abstract: Use of a flame hydrolysis apparatus for preparing fumed silica particles or a plasma torch apparatus for sintering fumed silica particles to fused silica particles is capable of producing highly pure silica with non-silicon metal impurities less than 500 pb, when at least an inner nozzle is constructed of a silicon-containing material having a low level of non-silicon metal impurities. Preferably, all surfaces in the respective apparatus which contact silica are of similar construction. The silica contains a low level of impurities as produced, without requiring further purification.
    Type: Application
    Filed: September 17, 2004
    Publication date: June 16, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Holger Szillat, Fritz Schwertferger, Bernd Haack, Marcus Schafer