Compositions and processes for removing, separating and concentrating desired ions from solutions
CA 2114553 C · Owner: Brigham Young University · Inventors: Bradshaw, Jerald S.; Bruening, Ronald L.; Tarbet, Bryon J.
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 Pd(II) Pt(IV), Pt(II), Pd(IV), Ru(III), Ru(II) Au(III), Os(IV), Au(I), Cu(I), Cu(II), Ag(I) and Hg(II) 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 a thiol and/or thioether aralkyl nitrogen-containing ligand covalently bonded through an organic spacer silicon grouping to a solid inorganic support. The thiol and/or thioether aralkyl nitrogen-containing ligand portion(s) of the compound has an affinity for the desired ions to form a complex thereby removing the desired ions from …
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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 August 7, 1992 and granted July 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 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.