Apparatus and method for improving density uniformity of a fluidized bed medium, and/or for improving material fluidized bed sorting
CA 2090032 C · Owner: Sddm, Inc. · Inventors: Zaltzman, Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (10) for providing a fluidized bed (24) to effect the separation of a mixture of articles (58 60) having at least, a first density and a second density that is greater than the first density into separate groups. The apparatus (10) includes an inclined trough (12) which is supplied at an input end (18) with either a fluidization medium such as sand, or a mixture of articles (58, 60) from which a fluidized bed (24) is formed by forcing gas upwardly through the bottom of the trough and through ~ fluidization medium or the mixture. In the case where a fluidization medium such as sand is used the mixture of article ~, introduced into the fluidized bed medium so as to be entrained …
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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 August 19, 1991 and granted April 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 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.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.