Patents by Inventor Stephen Howarth

Stephen Howarth 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).

  • Device for extracting and burning methane
    Patent number: 4907964
    Abstract: Apparatus for extracting and burning methane gas from a landfill refuse site comprises a first venturi to which is fed compressed air. The venturi is connected to a well in the site and acts to draw methane from the well. The methane/air mixture is fed to a second venturi for enrichment with air. The enriched mixture is fed to a burner for combustion.Preferably the compressed air is supplied by a diesel driven compressor.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: March 13, 1990
    Assignee: Coal Industry (Patents) Limited
    Inventors: Stephen Howarth, William L. Hall