Method for preparing a salt, particularly potassium chloride, by leaching and cooling a solution thereof
CA 2237425 C · Owner: Mahue, Bernard · Inventors: Mahue, Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing a salt, particularly potassium chloride by leaching a salt formation with an injected brine solution and separating salts from the saturated solution by cooling said solution to the eutectic point temperature recycling the hydrates and crystal mixtures separating out the crystals, and reinjecting the remaining brine 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 February 2, 1996 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 2018.
- 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.