Vacuum cleaner
CA 2258416 A1 · Owner: Szylowiec, Ted · Inventors: Szylowiec, Ted; Conrad, Wayne; Conrad, Helmut Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum cleaner comprising a dirty air inlet for receiving air containing dirt; a cyclone in flow communication with the dirty air inlet and having an air outlet; and a prandtl layer turbine, positioned downstream from and in flow communication with the air outlet wherein the prandtl layer turbine provides at least a portion of the motive force for drawing the air containing dirt through the cyclone.
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 8, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 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.