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Expired Canadian patentCanada

High-yield methane production process by culture of methanobacterium thermoautotrophicum or any other methanogenic bacterium having the same physiological growth properties

CA 1283876 C · Owner: Gaz De France · Inventors: Peillex, Jean-Paul; Fardeau, Marie-Laure; Belaich, Jean-Pierre

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Abstract From the Canadian patent

This invention relates to a high-yield methane production process, consisting in cultivating on a culture medium containing a source of nitrogen and assimilable salts, the methanogenic bacterium Methanobacterium thermoautotrophicum or any other methanogenic bacterium having the same physiological growth properties, with a forced supply of gaseous H2/CO2 mixture.

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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 May 7, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2008.
  • 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 15, 1987
GrantedMay 7, 1991
Term endedMay 7, 2008
Patent numberCA 1283876 C
Classification (IPC)C12P1/00 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJuly 15, 1987Patent grantedMay 7, 1991Term endedMay 7, 2008

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