Patents by Inventor Stefan Åhman

Stefan Åhman 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 and apparatus for cleaning flue gases
    Patent number: 6508994
    Abstract: A method and an apparatus for cleaning flue gases with particulate slaked lime are described. In the method, burnt lime is dry-slaked with water to a moisture content of at least 5% by weight, and the slaked lime is contacted with the flue gases within 1 minute of the slaking. Preferably, the slaked lime is mixed with recirculated powdered lime from the flue gas cleaning before contacting it with the flue gases.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: January 21, 2003
    Assignee: ABB Fläkt AB
    Inventors: Stefan Åhman, Nils Bringfors