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Expired Canadian patentCanada

Hydrocarbon recovery

CA 1107190 A · Owner: Polysar Limited · Inventors: Livingstone, Donald D.

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

HYDROCARBON RECOVERY", Abstract of the Disclosure A process is provided for the recovery of hydrocarbons from a gas stream normally supplied to a flarestack for combustion therein, which process does not interfere with the safe operation of the flare gas system. The process yields a liquid hydrocarbon stream and a gaseous hydrocarbon stream and provides a means for conserving hydrocarbons.

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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, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 6, 1979
GrantedAugust 18, 1981
Term endedAugust 18, 1998
Patent numberCA 1107190 A
Classification (IPC)F25J1/02 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedDec 6, 1979Patent grantedAug 18, 1981Term endedAug 18, 1998

Sources & verification

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