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Expired Canadian patentCanada

Condensation of zinc vapour

CA 1278432 C · Owner: Johansson, Borje · Inventors: Santen, Sven; Johansson, Borje

CIPO record

Overview

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

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Abstract From the Canadian patent

The present invention relates to a method and means for condensing zinc vapour out of a gas. A substantially coherent curtain of cooling metal is generated to-, wards which the gas containing zinc vapour is directed. The resultant mixture is expanded in an expansion zone and thereafter accelerated in a compression zone thus ensuring that all parts of the gas are brought into contact with the cooling metal. Particles and drops are then separated by passing the gas over the surface of a bath of cooling metal

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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 January 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 6, 1986
GrantedJanuary 2, 1991
Term endedJanuary 2, 2008
Patent numberCA 1278432 C
Classification (IPC)C22B5/16 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedJune 6, 1986Patent grantedJan 2, 1991Term endedJan 2, 2008

Sources & verification

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