Method of and apparatus for controlling ph and electric conductivity of water using ion exchange resin
CA 1330241 C · Owner: Nishimori, Tadao · Inventors: Matsunaga, Yoshihiro; Nishimori, Tadao; Matsuoka, Hiromasa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water is allowed to flow in parallel into a mixed bed in which an anion exchange resin and a cation exchange resin are accommodated in a mixed state and into a single bed in which an anion exchange resin or a cation exchange resin is accommodated. As the proportion of the flow rates of water introduced into the two beds is adjusted, the pH and electric conductivity of water is controlled. Control is effected in such a manner that the pH and electric conductivity of water are maintained at appropriate levels without using any chemicals.
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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
- Granted June 14, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2011.
- 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.