The magnetic separation of particles
CA 2370900 A1 · Owner: Dunn, Fredre · Inventors: Dunn, Fredre; Ennis, Jane Elizabeth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A set of magnetic tracers (48) is provided for the magnetic separation of ore particles into different fractions based on the magnetic susceptibility thereof. The set comprises a plurality of tracer groups (48.1 to 48.7) with , each group comprising a plurality of tracers each of which have the same , magnetic susceptibility and a common coloration (yellow pink, green, cinnamon, orange, brown and grey) by means of which the tracers in one group can be readily distinguished over tracers in another group. Separate groups in the set cover a predetermined range or spectrum of magnetic susceptibility values. The invention extends to a method of sorting a body of particulate ore material, …
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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 April 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2022.
- 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.