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Expired Canadian patentCanada

Recovery of viscous oil from geological reservoirs using hydrogen peroxide

CA 1309336 C · Owner: Bayless, Jack H. · Inventors: Williams, Robert E.; Bayless, Jack H.

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

Viscous oil in a geological formation is recovered by producing hydrogen peroxide near the formation injecting, hydrogen peroxide into the formation to effect its decomposition and reaction of oxygen with resident hydrocarbon, and recovering oil in response to injection of hydrogen peroxide.

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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 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 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.
FiledJuly 31, 1989
GrantedOctober 27, 1992
Term endedOctober 27, 2009
Patent numberCA 1309336 C
Classification (IPC)E21B43/24

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJuly 31, 1989Patent grantedOct 27, 1992Term endedOct 27, 2009

Sources & verification

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