Filter system
CA 2377102 A1 · Owner: Hmi Industries, Inc. · Inventors: Cartellone, Mark A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum cleaner having a reduced velocity chamber with a high velocity air inlet, an, electric motor, a rotary blade driven by the motor to create a vacuum in the chamber, an outlet for, exhausting air from the chamber which air flows in a selected path from the air inlet, through the, chamber and out the air exhaust outlet and a disposable porous sheet filter layer in the chamber for, removing large solid particles from the air.
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 March 18, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 18, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2024.
- 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.