Apparatus for producing deionized water
CA 2234185 A1 · Owner: Asahi Glass Company Ltd. · Inventors: Iwamoto, Junjiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for producing deionized water which, has an ion exchanger accommodated in demineralizing compartments of an electrodialyzer having cation exchange membranes and anion exchange membranes alternately arranged between an anode and a cathode wherein the ion, exchanger is a composite ion exchanger comprising a first porous ion exchanger having a mixture of 60 to 95 wt% of cation exchange resin particles and 5 to 40 wt% of anion exchange resin particles bonded to each other and a second porous ion exchanger having a mixture of 60 to 95 wt% of anion exchange resin particles and 5 to 40 wt% of cation exchange resin particles bonded to each other.
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 April 7, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2020.
- 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.