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Expired Canadian patentCanada

Process for separating co -from other gases

CA 1305074 C · Owner: Cynara Company (The) · Inventors: Kelly, Ralph M.

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

An improved process is described for separating carbon dioxide from light hydrocarbons by means of a membrane. The membrane separation is operated so that hydrocarbon liquids are condensed in contact with the membrane. This process is particularly valuable for the separation of gas mixtures into separate acid gas gaseous hydrocarbon and liquid hydrocarbon streams. 34,268-F

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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 July 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 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.
FiledSeptember 4, 1986
GrantedJuly 14, 1992
Term endedJuly 14, 2009
Patent numberCA 1305074 C
Classification (IPC)B01D53/22 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedSep 4, 1986Patent grantedJuly 14, 1992Term endedJuly 14, 2009

Sources & verification

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