Fluidized bed apparatus, in particular for granulation of pulverulent substance
CA 2000298 C · Owner: Huttlin, Herbert · Inventors: Huttlin, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a container (12) a treatment space (14) for substance (16) is arranged and therebelow a wind chamber (22). The wind chamber (22) is defined upwardly by a circular rotor disc (42) which is rotatable drivably about an upright central axis (A) and comprises at least one opening (44) which is elongated in approximately radial direction and which allows a gas stream (50) from the wind chamber (22) into the treatment space (14). The rotor disc (42) is formed as sole partition between wind chamber (22) and treatment space (14). Associated with the or each opening (44) of the rotor disc (42) is a closure means which is opened in normal operation but is closable for stopping the apparatus. …
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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 October 6, 1989 and granted July 16, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 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.