Process and apparatus for controlling gravity settling system
CA 2216558 C · Owner: Ferland, Pierre · Inventors: Doucet, Jean; Ferland, Pierre; Tremblay, Leopold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A testing device is, described for use in determining optimum operating conditions, for a full size industrial continuous gravity settling, unit and for the design of such settling unit. The testing, device comprises an elongated cylindrical settling column, having concentric inner and, outer transparent cylindrical walls forming an annular, space therebetween filled with transparent heat exchange liquid, with the inner wall defining a cylindrical settling cell. A, cylindrical feedwell extends downwardly into the top end, of the settling cell an overflow, outlet opening is provided in the inner wall at a location above, the bottom end of said feedwell a solids discharge opening is, provided …
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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 16, 1996 and granted July 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2018.
- 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.