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Expired Canadian patentCanada

Method for production of organic products from kerogen

CA 1105376 A · Owner: Badger Company, Inc. (The) · Inventors: Dauphine, Thonet C.

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Abstract From the Canadian patent

A method of producing fluid organic products from kerogen in situ in a body of oil shale by the application of alternating electric fields having a frequency between 100 kilohertz and 100 megahertz to heat the kerogen in the oil shale to a temperature in the range of 200°C to 360°C and to maintain the kerogen in this temperature range for a period of time sufficient to convert a substantial portion of the kerogen in oil shale to fluid organic products which may be collected through passages produced in the oil shale formation by flowing to a well bore having a collection sump.

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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 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 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.
FiledMay 17, 1977
GrantedJuly 21, 1981
Term endedJuly 21, 1998
Patent numberCA 1105376 A
Classification (IPC)E21B43/24

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedMay 17, 1977Patent grantedJuly 21, 1981Term endedJuly 21, 1998

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