Patents by Inventor Ernst Bareuther

Ernst Bareuther 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 a meta-kaolin white pigment from kaolinite
    Patent number: 5674315
    Abstract: A fluidized bed reactor is supplied with fuel, oxygen-containing gas, and kaolinite, which contains water of crystallization. At least 80% by weight of the kaolinite have particle sizes in the range from 0.1 to 3 mm. A fluidized bed at temperatures in the range from 850.degree. to 950.degree. C. is formed in the fluidized bed reactor. A meta-kaolin white pigment which contains water of crystallization not in excess of 2% by weight is withdrawn from the fluidized bed reactor.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: October 7, 1997
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Ernst Bareuther, Jochen Kauper, Werner Stockhausen, Martin Rahn
  • Method of extracting gold and silver from an ore
    Patent number: 4438076
    Abstract: Gold and/or silver is leached from comminuted ore with an alkaline cyanide lixiviant at a superatmospheric pressure of at least 25 bar and with high purity oxygen (at least 90% pure) to reduce the residence time at high yield.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: March 20, 1984
    Assignees: Metallgesellschaft AG, Vereinigte Aluminum-Werke AG
    Inventors: Hartmut Pietsch, Wolfgang Turke, Ernst Bareuther, Fritz Kampf, Hubert Bings