Chimney flue brush
CA 1333320 C · Owner: Drobot, Alan Johnny · Inventors: Drobot, Alan Johnny
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A brush for cleaning a chimney flue is formed from a central hub outwardly from which extends a plurality of plastics strips manufactured from strapping tape having a width of the order of 1/2 inch and a thickness of the order of .030 inch. The device is manufactured from a plurality of separate units each formed with six outwardly extending strips or blades and a central hub with all of the units stacked on a bolt and prevented from rotation each relative to the next. A natural curvature of the strips tends to form a device into a cone shape so they can be readily pressed into a chimney flue from the lower end with the flexibility of the strapping tape enabling the unit to be compressed …
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
- Granted December 6, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 6, 2011.
- 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.