Vacuum cleaner
CA 2309011 A1 · Owner: Mitchell, Carl · Inventors: Mitchell, Carl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The vacuum cleaner includes a hollow canister one end of, which is closed by a removable cap to permit removal of debris from within the interior. The canister is separated into two compartments, one defined by the first end and a hollow rigid conical filter disposed in the interior. The filter has a base adjacent to the inner wall throughout its extent and tapers toward the second end of the canister. The filter further has openings too small to allow debris such as cigarette and cigar butts, excrement of animals and birds and the like to pass therethrough but large enough to allow smaller debris to pass . A second compartment is defined by the filter and a relatively flat filter having …
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 May 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 23, 2022.
- 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.