Extraction recovery of certain metal values
CA 1090145 A · Owner: Henkel Corporation · Inventors: Virnig, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract Of The Disclosure, Particular metal values are recovered from their aqueous solutions by using sulfonamidoquinolines dissolved in essentially water-immiscible organic solvents. The process involves contacting the solutions and stripping metal values from the loaded organic phase, the metal complexes of the sulfonamidoquinolines also being soluble in the organic solvents.
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 November 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 1997.
- 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.