Natural draft automatic feed pellet stove
CA 2226820 C · Owner: Jarvi, Michael A. · Inventors: Jarvi, Michael A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A natural draft, gravity feed pellet stove. The body of the stove is formed by a vertical section of large diameter pipe, with an air intake pipe extending from the back of the stove to below a combustion grate. Pellet fuel is discharged onto the grate through a slot at the bottom of a hopper, and the grate is sloped so that the pellets roll away from the slot and over the grate as they are combusted. The combustion gasses flow into two exhaust pipes, each having a diameter similar to that of the intake pipe so as to establish a 2:1 exhaust/intake flow ratio. Cross-drilled reburner tubes are installed across the intake ends of the exhaust pipes to provide additional air for complete …
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 13, 1998 and granted September 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2020.
- 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.