Process of removing suspended metal corrosion products insoluble or sparingly soluble in water and condensate treating equipment
CA 2061250 A1 · Owner: Kagawa, Takashi · Inventors: Higosaki, Nobuyuki; Yagishashi, Tateo; Yagishashi, Takeo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of this invention is to provide means for treating power-plant condensate containing suspended metal corrosion products insoluble or sparingly soluble in water. The efficacy with which these products are removed is improved by treating the condensate with a cation filter charged with a cation exchange resin comprising a copolymer matrix which is obtained by polymerizing an aromatic monovinyl compound and, as crosslinking agents an, aromatic polyvinyl compound and an ester-type polyvinyl compound or by treating the condensate with a mixed bed of the cation exchange resin and an anion exchange resin.
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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
- Filed February 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 2014.
- 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.