Roof vent
CA 2280320 C · Owner: Dundas Jafine Inc. · Inventors: Jafine, Michael David; Jafine, Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roof vent comprises two parts, a cover and a conduit. The conduit with a pipeline already attached, can be easily connected to the cover after the cover has been installed on a roof. The conduit will plug into the cover making installation easy. The vent includes a channel or moat which surrounds the outlet of the conduit. Thus if during extreme weather conditions, moisture passes into the cover from outside through its opening and if it gets past the door flap it will be trapped in the channel.
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 August 13, 1999 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 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.