Intelligent and all-bearing control circuit device of reverse osmosis drinking water machine
CA 2134936 A1 · Owner: Hsu, Chao Fou · Inventors: Hsu, Chao Fou
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The control circuit device of a reverse osmosis drinking water machine is provided with a microcomputer unit controlling the working of various peripheral circuits and enabling the drinking water machine to determine the quality of the drinking water and to clean automatically the filtration elements of the basis of the determined quality of the drinking water . The device is further provided with an output unit capable of giving an advance warning to remind the user of need to replace the worn-out filtration elements . The output unit is also capable of terminating automatically the water-making process when the PPM value of the drinking water so made is not in conformity with the health …
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 2, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2016.
- 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.