Chimney cleaning tool
CA 2061964 A1 · Owner: Brewster, John S. · Inventors: Brewster, John S.; Brewster, John S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chimney cleaning tool for removing accumulations of foreign materials from the interior surfaces of smoke chambers and chimney flues of fireplaces and furnaces. The invention comprises a hub which is adapted to be rotated by a power driven rod, a single resilient multi-wire cable clamped to the hub and U-bolts with hex nuts for clamping the cable to the hub. The cable has loop shaped portions arranged in perpendicular relationship to the rotational axle of the hub which extend outwardly from the hub. When the tool is inserted into a chimney flue, rotated, and brought to bear against the interior surfaces of the flue, the outer portions of loops rapidly remove accumulated materials from …
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 February 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2014.
- 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.