Fireplace and method for cooling same
CA 2114405 C · Owner: Cfm Corporation · Inventors: Maitland, Kenneth R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fireplace having a bottom wall, inner top wall, two side walls and rear wall defines a combustion chamber having a front opening. An outer top wall is disposed above the inner top wall. The outer top wall and the inner top wall are disposed in spaced apart relationship relative to each other and define an air flow channel therebetween having an inlet. The outer top wall is an upper exterior surface of the fireplace and includes a first nozzle member. The inner top wall is an upper interior surface of the combustion chamber and includes a second nozzle member. A chimney flue is attached to the outer top wall. The first and second nozzle members are in fluid communication with the chimney …
Read the whole patent
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
- Filed January 27, 1994 and granted April 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 2016.
- 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.