Improved air curtain vestibule
CA 2316468 A1 · Owner: Strycharske, Thomas D. · Inventors: Strycharske, Thomas D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air curtain vestibule for preventing cross-filtration of air at a doorway between a, relatively warm area and a relatively cool area has duct work and an air mover. The duct, work includes a supply air plenum and a return air plenum at opposite sides of the doorway, joined by an intermediate air plenum at the top of the doorway. The intermediate air plenum, houses the air mover which creates an air stream circulated through the duct work. Within, the intermediate air plenum the return air, comprising a portion of an air curtain air stream, cold side air and a lesser amount of warm side air is mixed. Mixing the air , masses reduces the moisture content of the of air stream drawn …
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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 August 15, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 15, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 2022.
- 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.