Classifier for powdery material
CA 2047494 A1 · Owner: Ihara, Yoshitaka · Inventors: Ihara, Yoshitaka; Ganse, Akira; Ishikawa, Hidemasa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A classifier for powdery material having a cylindrical casing formed at an upper portion thereof with an inlet port for introducing the material to be classified into the casing in a tangential direction of an inner wall thereof. The casing has a conical portion formed in its bottom end with an opening connected to a discharge pipe for discharging coarse particles. Further, there is provided an outlet pipe protruding into the casing through its top. The inlet port is located higher than the bottom end of the outlet port. An externally-driven vane wheel is provided under the outlet pipe in a concentric-relationship with respect to the casing.
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 July 22, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2013.
- 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.