Method and apparatus for separating pulp material
CA 2386167 A1 · Owner: Schmittel, Richard L. · Inventors: Schmittel, Richard L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and centrifugal apparatus for separating more dense particles from less dense particles contained in a slurry. The separator apparatus receives slurry into a rotor assembly (10) consisting of a bowl (14) open upwardly and a surrounding hutch chamber (22). The bowl (14) has a lower impermeable portion (14), an upper impermeable portion (15) and a frusto-conical screen , (16). Elutriation liquid is continuously supplied to the interior of the hutch chamber (22), and a plurality of pulse blocks (30) supply intermittent pulses of liquid to the hutch chamber (22). A dam (20A) is formed at the top of the screen.
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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 September 28, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 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.