Method for enriching raw salt
CA 2285680 A1 · Owner: Solvay (Societe Anonyme) · Inventors: Ninane, Leon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for enriching raw salt whereby the salt is ground (2), then cooled (7-18) in an aqueous solution saturated with sodium chloride to a temperature lower than the transition temperature of anhydrous sodium chloride and dehydrate sodium chloride; then collecting a powder gruel (9) containing sodium chloride crystals and subjecting the powder to size grading fractionating (10) from which a fine grading fraction (12) and a coarse grading fraction (11) comprising enriched salt are collected.
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 April 2, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2020.
- 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.