Patents by Inventor Jurgen Lehrke

Jurgen Lehrke 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).

  • Patent number: 5797496
    Abstract: A method for the utilization of ash from coal-fired plants, in which openss ash is drawn off when it is dry for further use. According to one embodiment of the invention, the open-pass ash is used as a raw material and fuel in cement production. According to another embodiment, the open-pass ash is used as bed sand with combustible constituents in fluidized-bed firing. According to still another embodiment, the ash is used for the purpose of influencing sinterability in the production of sintered lightweight aggregates. The mineral constituents can be separated from carbon-containing constituents, which are capable of being used as fuel or activated coke, and used as fine sand in any of these embodiments.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: August 25, 1998
    Assignees: Sicowa Verfahrenstechnik Fur Baustoffe GmbH & Co., KG, ProMineral Gesellschaft Zur Verwendung von Mineralstoffen mbH
    Inventors: Gunther Kirchen, Jurgen Lehrke