Processing of nickel bearing solutions
CA 2396972 A1 · Owner: Lakefield Research Limited · Inventors: Ferron, Cesar J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for recovering a nickel constituent from a solution containing iron, cobalt and manganese, comprising the steps of: a) removing the iron from the solution using an oxidation and partial neutralization step;, b) removing cobalt and manganese together from the solution using an oxidation step at a, pH ranging from about 1 to about 4 to leave substantially all of said nickel constituent in, solution; and, c) recovering the nickel constituent from solution.
Read the whole patent
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, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2024.
- 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.