Bagless vacuum cleaner with helical passageway
CA 2432974 A1 · Owner: Kee, Billy Yung Kwok · Inventors: Kee, Billy Yung Kwok
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bagless vacuum cleaner having a removable dust extraction and collection unit. The removable dust extraction and collection unit has a cover which defines an air inlet, port. The air inlet port includes a helical passageway disposed within a peripheral portion of, the cover. The helical passageway directs incoming air to the dust extraction and collection, unit in a downwardly directed cyclone flow pattern.
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 20, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 20, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2025.
- 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.