Dehumidifier
CA 2018602 C · Owner: Lestage, Marc Richard · Inventors: Lestage, Marc Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an air extraction apparatus for conditioning air in an enclosed space wherein the air in said enclosed space is stratified due to a temperature gradient between a ceiling and floor of the enclosed space. The apparatus includes a conduit having an inlet end and an outlet end, the conduit adapted to be arranged and installed with its outlet end in communication with an opening in a wall of the enclosure and its inlet end in proximity to the floor when in use. A fan means is located in the conduit to effect movement of air from the floor level of the enclosure through the inlet end to and outwardly of the outlet end. A control means is attached to the conduit and 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 7, 1990 and granted September 21, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2012.
- 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.