Method for the removal of ferric ions from a concentrated aqueous zinc solution
CA 1095262 A · Owner: Akzona Incorporated · Inventors: Pannekeet, Wilhelmus; Koerts, Kees; Van Den Berg, Gerrit H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ferric ions are removed from a concentrated aqueous zinc solution having a pH value in the range of about O to about 1.3, by contacting the zinc solution with a cation exchanger chelate resin containing aminocarboxylic acid and/or iminodicarboxylic acid groups.
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
- Granted February 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 10, 1998.
- 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.