Removable self-locking chimney cap
CA 2276674 C · Owner: Trans Continental Equipment Ltd. · Inventors: Barnoff, Dalton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a removable self-locking chimney cap which is screwless. The chimney cap comprises a stationary member and a removable member removably mountable to the stationary member. The stationary member comprises a base plate adapted to be secured to the end of the chimney or venting system and defining an opening and a first tube mounted to the base plate around the opening. The removable member comprises a second tube adapted to slide over the first tube and a cap mounted to the second tube the first and the second tubes comprising a pin and a corresponding bayonet slot adapted to receive the pin whereby when the second tube slides over the first tube the pin is …
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 June 30, 1999 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2021.
- 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.