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Expired Canadian patentCanada

Utilization system of heavy water heat in nuclear reactor

CA 1304232 C · Owner: Doryokuro Kakunenryo Kaihatsu Jigyodan · Inventors: Shimomura, Kazuo

CIPO record

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

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Abstract From the Canadian patent

A utilization system of heavy water heat in a nuclear reactor includes a heavy water cooling system and a low temperature Rankine cycle system for heat recovering. The low temperature Rankine cycle system has an expansion machine for expanding a low boiling point medium to provide work, a condenser for cooling and condensing the low boiling point medium after expanded in the expansion machine as such, and a low boiling point medium circulation pump for circulating the low boiling point medium so condensed, whereby it receives heat from the heat exchanger of the heavy water cooling system for evaparating it. The heavy water cooling system further includes a refrigeration cycle system …

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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 June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 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.
FiledDecember 16, 1986
GrantedJune 30, 1992
Term endedJune 30, 2009
Patent numberCA 1304232 C
Classification (IPC)G21D9/00 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 16, 1986Patent grantedJune 30, 1992Term endedJune 30, 2009

Sources & verification

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