Patents by Inventor Andrew R. Butt

Andrew R. Butt 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).

  • Hot gas generation
    Patent number: 4627367
    Abstract: In a hot gas generating apparatus coal is fed to a first gasifying fluidized bed wherein it is partially gasified to generate a combustible gas and char. The char is circulated to a second combustion fluidized bed for burning in the presence of excess air. The combustible gas is mixed with the oxygen rich gases from the second bed and burnt to give a hot gas product.
    Type: Grant
    Filed: November 14, 1984
    Date of Patent: December 9, 1986
    Assignee: Coal Industry (Patents) Limited
    Inventor: Andrew R. Butt