Ventilating apparatus
CA 1069749 A · Owner: Econovent Systems · Inventors: Nett, Louis A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ventilating apparatus having an exhaust hood for mounting in a room and normally above a stove grill, or, other apparatus from which fumes arise. Ambient air from outside the room being ventilated is forced into an insulated intake chamber through a relatively narrow longitudinal slot at the bottom of the intake chamber, thence directed rearwardly and upwardly across a fume collection chamber through a grease filter, and into an exhaust chamber from which the fumes are exhausted to the atmosphere by a fan. The outside air is forced through the slot in a fast moving narrow stream to form an air curtain across the fume collection chamber with minimal mixing of the fume laden air and the air …
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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- 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.