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Expired Canadian patentCanada

Contactor process

CA 1137281 A · Owner: Rtl Contactor Holding Sa · Inventors: Robinson, Lee F.

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

A process is described for contacting a first liquid with a second immiscible liquid or with solids carried therein. The process uses a contactor comprising a drum in which is mounted a rotor having axially spaced discs to divide the drum into intercommunicating compartments. Buckets rotate with the discs in at least some of the compartments so as to cause intermingling of the liquids. A reagent to promote the process is injected in at least some of the compartments.

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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 December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
  • 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 12, 1979
GrantedDecember 14, 1982
Term endedDecember 14, 1999
Patent numberCA 1137281 A
Classification (IPC)B01J14/00

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJuly 12, 1979Patent grantedDec 14, 1982Term endedDec 14, 1999

Sources & verification

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