Filter automatic cleansing water cleaner
CA 2054508 A1 · Owner: Chen, Tsong-Hae · Inventors: Chen, Tsong-Hae
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for cleansing water including a fluid driven cleaner is disclosed herein. The apparatus includes a hollow casing having an upper open end and a central axis a perforated, tube disposed along said central axis inside the casing the tube, being in flow communication with a drinking water control valve a Porous ceramic core filter element disposed around the tube a, cover for covering said upper open end the cover including an, axle, an upper float disposed above the filter element the upper, float including a hole, the axle being rotatably disposed in the hole in the upper float, a lower float disposed below the filter element, the upper and lower floats including fastening means …
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 October 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2013.
- 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.