Apparatus for heating and ventilating a farm enclosure
CA 2323013 A1 · Owner: Doss, James R. · Inventors: Mille, David J.; Doss, James R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for heating and ventilating a farm enclosure. The apparatus includes an energy exchange unit for preheating fresh intake air delivered to the enclosure. The unit has a first air manifold on its upper end including a fresh air intake duct and an exhaust air duct. The unit also has a second air manifold on its lower end which has an intake section and an exhaust section. A turbulation baffle is held within the unit between the fist and second air manifolds. The intake section of the second air manifold communicates with the fresh air intake duct of the first air manifold through a plurality of intake baffle sections. The exhaust section of the second manifold …
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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 January 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 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.