Vacuum cleaner with cantilevered drive system and removable belt access door
CA 2211461 C · Owner: Ho, Michael Kin-Chung · Inventors: Ho, Michael Kin-Chung; Melito, Maurice Anthony; O'Dea, Kevin J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum cleaner with a handle and a floor traveling head. The head has a housing a rotatable brush and a drive, system. The housing has a bottom member with an aperture directly under a transmission belt of the drive system. A removable door is mounted to the bottom member such that a user can access the transmission belt without removing the bottom member.
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 July 24, 1997 and granted September 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2019.
- 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.