Method and a device for preparing brine
CA 2048431 C · Owner: Eka Nobel Ab · Inventors: Tewari, Mohan Prasad
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 of preparing brine from sodium chloride salt containing one or more water-soluble impurities having an aqueous dissolution rate lower than that of sodium chloride, the method comprising the steps of:, (a) forming a salt bed in a vessel the vessel, including a grid for supporting the salt bed; (b) wetting at least a portion of the salt bed with a flow of water;, (c) forming a brine solution by at least partially dissolving the wetted portion of the salt bed in the water; (d) forming small solid particles in the wetted portion of the salt bed, said small particles containing one or more water-soluble impurities but substantially no sodium chloride;, (e) passing …
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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 August 5, 1991 and granted July 8, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 2013.
- 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.