Centrifugal jig pulsing system
CA 2074465 C · Owner: Fine Gold Recovery Systems Inc. · Inventors: Campbell, Thomas P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A centrifugal jig screen (16) with a rotating hutch (40) is supplied with inwardly directed pulses by overlapping fluid supply nozzles (23) and pulse blocks (25) coaxially arranged about the jig axis (Y-Y). Fluid not directed to the hutch interior in sharply defined pulses is diverted into a surrounding shroud (34), permitting the incoming fluid flow to be substantially uninterrupted, during jig operation. Wedge surfaces (54) about the hutch prevent buildup of separated materials as the are discharged from the hutch (40).
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 December 27, 1990 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2012.
- 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.