Vent cap for exhausting gas from a chimney duct under high-velocity wind conditions
CA 2249688 A1 · Owner: Hart & Cooley, Inc. · Inventors: Rademaker, Johan K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vent cap for exhausting gases from an exhaust duct. The vent cap comprising a collar adapted to fit over the exhaust duct and a baffle mounted to the, collar. A cover plate is disposed above the collar to laterally deflect exhaust gases. A, peripheral wall circumscribes the cover plate baffle and collar and defines , an upper opening with the cover plate and a lower opening with the baffle. The upper and, lower openings create an external air flow passage that draws away the laterally, directed exhaust gases.
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 October 26, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2020.
- 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.