Patents by Inventor Gunther Kratel

Gunther Kratel 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 preparing hydrophobic silicon dioxide
    Patent number: 3953487
    Abstract: Process for preparing hydrophobic SiO.sub.2 by reacting solid SiO.sub.2 of finest particle size with organosilicon compounds while subjecting the reaction mixture to a mechanical impact treatment which will at the same time result in a comminution of the SiO.sub.2 particles as well as of their aggregates, said process comprising incorporation to the reaction mixture, in addition to the water adsorbed by the SiO.sub.2, an amount of 0.3 to 3% by weight of water calculated on the weight of the SiO.sub.2.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: April 27, 1976
    Assignee: Elektroschmelzwerk Kempten GmbH
    Inventors: Gunther Kratel, Gunter Stohr, Georg Vogt, Hans Kaiser