Aminoalkylphosphonic acid containing ligands attached to solid supports for removal of metal ions
CA 2120242 C · Owner: Tarbet, Bryon J. · Inventors: Tarbet, Bryon J.; Bradshaw, Jerald S.; Krakowiak, Krzysztof E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the removal and concentration of desired ions such as Sb3+ Zr4+, Zn2+, Pu4+, Hf4+, Cu2+, Ni2+, Fe3+ Cd2+, Ag+, and Hg2+ from a multiple ion source solution which may contain larger concentrations of other undesired ions including H+ comprises bringing the source solution into contact with a compound comprising an aminoalkylphosphonic acid containing ligand covenlently bonded through an organic spacer silicon grouping to a solid inorganic support. The aminoalkylphosphonic acid containing ligand portion(s) of the compound has an affinity for the desired ions to form a complex thereby removing the desired ions from the source solution. The desired ions are removed from the …
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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 September 14, 1992 and granted December 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2014.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.