Extraction of transition metals from organic solutions
CA 1295486 C · Owner: Grotenhuis, Paulus Alexander Maria · Inventors: Grotenhuis, Paulus Alexander Maria; Goodall, Brian Leslie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Transition metals are recovered from an organic medium by liquid-liquid extraction into an aqueous phase in the presence of a water-soluble cyclic phosphite, forming an aqueous extract phase containing the metals in complex combination with the cyclic phosphite.
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 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 2009.
- 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.