Fertiliser solutions
CA 1084291 A · Owner: Imperial Chemical Industries Limited · Inventors: Elson, Robert; Ward, Michael J.; Palgrave, Derek A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An NPK fertilizer solution is treated with an acid till crystals of a solid solution of monoammonium orthophosphate in monopotassium orthophosphate crystallise out the crystals, are separated from the supernatent liquor and redissolved to form an NPK solution of decreased chloride content with the, supernatent liquor comprising an NPK solution of enhanced chloride content.
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 August 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 1997.
- 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.