Fireplace heat absorbing and transmitting apparatus
CA 1262846 C · Owner: Hoffman, Lorne Murril · Inventors: Hoffman, Lorne Murril; Hoffman, Kenneth Burton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to a novel apparatus which can be mounted above the firebox of a conventional fireplace in a dwelling for the purpose of extracting heat from hot flue gas emitted by fuel burned in the fireplace and utilizing the extracted heat to warm air which is transmitted into the room in which the fireplace is located. An apparatus for use in association with a fireplace located in a dwelling the fire-, place being constructed of a firebox and a chimney connected with the firebox comprising: (a) passage means associated with the apparatus for enabling hot flue gas generated by fuel burned in the firebox to pass proximate to the apparatus before passing up the chimney; (b) …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.