Vacuum cleaner having a reusable dirt cup
CA 2256777 A1 · Owner: Smith, Jeffrey · Inventors: Smith, Jeffrey; Thomas, Joyce K.; Hohulin, Samuel E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum cleaner assembly including a motor housing a motor and fan assembly mounted in the motor housing and a dirt containment chamber having an air intake at one end. An apertured wall is provided at one end of the motor housing so that the fan is closely adjacent the aperture. A planer filter is provided within the containment chamber and extends from a distal end to a proximal end of the chamber to separate the chamber into an air flow chamber and a dirt chamber. The aperture is separated from air flow communication with said intake opening by the filter.
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 7, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 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.