Device and method for ventilation
CA 2050474 A1 · Owner: Pellinen, Teuvo · Inventors: Pellinen, Teuvo; Aalto, Erkki; Kyllonen, Pekka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a ventilation device through which, impure air is removed out of a room in particular out of the, proximity of a source of impurities at a working point in the room space. According to the invention through the device, besides the removal of impure air and/or excess heat from the source of impurities as a limited-area removal air of, general removal is also removed through the device the, suction opening for general removal being preferably opened into the same exhaust chamber into which the suction opening for the space for collecting of impurities in the interior of, for example, a kitchen hood is opened. The device may also include a flow opening for the general …
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 January 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2013.
- 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.