Method and apparatus for separating sand from botanical fines
CA 1165278 A · Owner: Brown & Williamson Tobacco Corporation · Inventors: Scholten, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
David L. SCHOLTEN ABSTRACT, A mixture of botanical fines and sand is separated by a porous separating medium horizontally disposed within an enclosed chamber in which an upflowing stream of gas carries out the separation. The porous separating medium is comprised of a pair of opposed rotatively movable juxtaposed porous members with means for rotatively adjusting the porous members so as to change the flow through area in the porous separating medium. As a gas flows up through the porous separating medium, only the sand passes down through the porous medium and the gas entrains the botanical fines portion of the mixture above the porous members removing the botanical fines with the gas …
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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
- Granted April 10, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2001.
- 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.