Electrical deionization apparatus
CA 2454520 A1 · Owner: Kawamoto, Takayoshi · Inventors: Takahashi, Yohei; Akiyama, Toru; Fujiwara, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel-structure electric demineralizer capable of a long-hour operation at a low voltage, comprising a cation exchange membranes and anion exchange membranes arranged between an anode and a cathode to form a plurality of chambers, characterized in that a hydrolysis chamber is define by an anodeside anion exchange membrane and a cathode-side cation exchange membrane an , anion demineralizing chamber held between anion exchange memberanes is disposed on the anode side of the hydrolysis chamber and a cation , demineralizing chamber held between cation exchange memberanes is disposed on the cathode side of the hydrolysis chamber.
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 15, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2025.
- 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.