Flue cleaner
CA 2463992 C · Owner: Hutchison, Peter Leonard · Inventors: Hutchison, Peter Leonard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a flue cleaner which can be used with a fire grate stove, fireplace or a closed fire box or similar which communicates with a chimney. The flue clearner clears soot and residue from the chimney. The flue cleaner comprises a containment vessel having an opening providing restricted communication between the interior and exterior of the vessel. The vessel is formed of a non-combustible heat resistant material the interior of which , contains a soot removal agent.
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 April 6, 2004 and granted October 21, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2026.
- 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.