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Expired Canadian patentCanada

Oil processing apparatus

CA 1262531 C · Owner: Prendergast, Gavan J.J. · Inventors: Carroll, Noel; Prendergast, Gavan J.J.

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

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Abstract From the Canadian patent

OIL PROCESSING APPARATUS, "ABSTRACT", Oil processing apparatus for the treatment of a mixture containing oil and other constituents. The apparatus comprises two types of separators arranged to co-operate together, the first separator 22 being of the type capable of handling a mixture containing a relatively high percentage of oil and the second separator 26 being of the type capable of handling mixtures containing a relatively low percentage of oil so that substantially full separation of the oil and other components can be achieved. There is also provided a system for recovering oil from a subterranean reservoir wherein apparatus which may be of the type described above is at least …

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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 October 31, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 31, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 28, 1985
GrantedOctober 31, 1989
Term endedOctober 31, 2006
Patent numberCA 1262531 C
Classification (IPC)B01D17/03 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedNov 28, 1985Patent grantedOct 31, 1989Term endedOct 31, 2006

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