Patents by Inventor Douglas Hadfield

Douglas Hadfield 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).

  • Fireplace and fireback therefor
    Patent number: 6941944
    Abstract: A fireback for use in domestic open fireplaces and which in use surrounds the fire bed and which extends upwardly to a throat (31) which in use connects with a chimney. The fireback (25) has walls with inner surfaces (26) that slope steadily inwardly from near its base (29) to the throat 31 decreasing the cross sectional area of the fireback, the larger area being at the level of the fire bed and smaller area being adjacent the throat 31.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: September 13, 2005
    Inventor: Douglas Hadfield
  • Fireplace and fireback therefor
    Publication number: 20040065318
    Abstract: A fireback or use in domestic open fireplaces and which in use surrounds the firebed and which extends upwardly to a throat which in use connects with a chimney. The fireback (25) has walls with inner surfaces (26) that slope steadily inwardly from near its base (30) to the throat (29) decreasing the cross sectional area of the fireback, the larger area being at the level of the fire bed and smaller area being adjacent the throat(29).
    Type: Application
    Filed: October 7, 2003
    Publication date: April 8, 2004
    Inventor: Douglas Hadfield