Inorganic ion exchangers for removing contaminant metal ions from liquid streams
CA 2448865 A1 · Owner: Australian Nuclear Science & Technology Organisation · Inventors: Luca, Vittorio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to processes and compositions for at least partially removing cations of one or more metals selected from the group consisting of caesium, strontium, lead, silver, transition metals lanthanides and actinides , from a liquid containing the cations. The process comprises contacting the liquid with a sorbent material in an amount and for a time sufficient to at least reduce the concentration of the cations wherein the sorbent material is , a metal oxide composition having the empirical formula Ax/nByM1yO3+.delta.x.ZH2O where M is one or more metals of Group Vb or Vlb of the Periodic Table; A is a cation selected from the group consisting of alkali metals, alkaline …
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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 May 31, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 31, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2023.
- 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.