Vortex pneumatic classifier
CA 2134456 A1 · Owner: Chichibu Onoda Cement Corporation · Inventors: Fujii, Satoru; Tamashige, Takamiki; Ito, Mitsuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vortex type air classifier comprises a rotor provided with a plurality of vortex controlling blades and guide vanes provided, about the outer peripheries of the blades with a classification chamber therebetween. A setting pitch P is found by the following expression in relation to separated particle sizes Dp (th) so that, powder materials are accurately classified at a desired point of classification: P Í 1.04 x Dp(th)0.365.
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 March 29, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 29, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 2016.
- 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.