Household cleaning equipment
CA 2222558 A1 · Owner: Wu, Chia-Hao · Inventors: Wu, Chia-Hao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A household cleaning equipment includes a hollow handle filled up with a liquid detergent piston means, mounted in a hole on the handle and driven to pump the liquid detergent out of the handle, and a brush head coupled to the front end of the handle and having a through hole connected to the output port of the piston means, whereby the cleaning equipment can be rapidly engaged with various kinds of brush heads as required.
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 November 27, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 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.