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Expired Canadian patentCanada

Electrolytic treatment using vibratory conveyor with helical track

CA 1296291 C · Owner: Siemens Aktiengesellschaft · Inventors: Gehring, Johann; Birkle, Siegfried

CIPO record

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Drawings and full text

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

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Abstract From the Canadian patent

An apparatus for electrolytic surface treatment of goods comprises a tank for the acceptance of a treatment bath an, arrangement for contacting the goods with one pole of an electrical source, at least one electrode arranged in the treatment bath having an opposite polarity to the polarity of the one pole which is contacting the goods being treated a vibratory, conveyor having a helically ascending conveyor track for transporting the goods through the tank characterized by the, electrode being a helically shaped electrode being positioned to be equally spaced from the surface of the conveyor track. The apparatus is particularly useful for the electro-deposition of aluminum from aprotic, …

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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 February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 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.
FiledJuly 7, 1986
GrantedFebruary 25, 1992
Term endedFebruary 25, 2009
Patent numberCA 1296291 C
Classification (IPC)C25D17/16 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedJuly 7, 1986Patent grantedFeb 25, 1992Term endedFeb 25, 2009

Sources & verification

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