Production of a magnesium product from a magnesite ore
CA 1338837 C · Owner: Elsner, Dagwin · Inventors: Elsner, Dagwin; Jones, Michael Henry Llewellyn; Frost, Malcolm Timothy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of a magnesium product from an ore containing magnesite which process includes providing a magnesite-containing ore; and a source of acid, subjecting the magnesite-containing ore to a first partial acid digestion at a pharmaceutical generally constant actual pH and, subjecting the partially digested product to a final acid digestion wherein the indicated pH is permitted to rise to an approximately neutral value.
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 January 14, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 14, 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.