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Expired Canadian patentCanada

Method and means for drying bulk goods

CA 1306352 C · Owner: Birkle, Siegfried · Inventors: Birkle, Siegfried; Gehring, Johann

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method and means for drying or dewatering bulk goods in which the goods are transported through a drying space by means of a helical vibrator conveyor in the presence of an inert gas. The moisture is displaced by a fluid bath contained in the drying space and consisting of a liquid which is lighter than water and is immiscible with water. A conduit is provided for eliminating the displaced moisture in the vicinity of the floor region of the drying space. The invention is particularly suited for dewatering bulk goods that are to receive electro-plated aluminum coatings with an oxygen-free, water-free aluminum-organic electrolyte.

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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 August 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 14, 1988
GrantedAugust 18, 1992
Term endedAugust 18, 2009
Patent numberCA 1306352 C
Classification (IPC)F26B3/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedApril 14, 1988Patent grantedAug 18, 1992Term endedAug 18, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.