Pressure-fed separation apparatus
CA 2003414 C · Owner: Contra-Shear Exports Limited · Inventors: Burgess, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure-fed apparatus for the separation of solids and liquids from a suspension has a fine-apertured rotatable screening drum inlet, means to introduce a flow of suspension into the interior of the screening drum under pressure. Feed means comprising a plurality of nozzles eject the suspension tangentially onto the inner surface of the screening drum and from a position directly adjacent the said inner surface. Suspension may be ejected with or against the direction of rotation of the drum.
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 November 20, 1989 and granted November 12, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2011.
- 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.