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Expired Canadian patentCanada

Improved triple effect absorption cycle apparatus

CA 2121789 C · Owner: Rocky Research · Inventors: Sarkisian, Paul; Rockenfeller, Uwe

CIPO record

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Abstract From the Canadian patent

The basic apparatus of the invention is a triple effect absorption cycle apparatus, comprising first, second and third generators (G1, G2, G3) each containing an aqueous absorption fluid and operating at successively higher temperatures; first sec-, ond and third condensers (C1, C2 C3) operating at successively higher , temperatures and operatively communicating with the generators (G1, G2; G3); first heat exchange means cooperating between the third and second generators, and between the second condenser and first generator; for directing energy therebetween; one two , or three absorbers (A1, A2, A3) and one two or, three fluid loops for directing aqueous absorption fluid between …

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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

  • Filed November 24, 1992 and granted January 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 24, 2012.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2014.
  • 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 24, 1992
GrantedJanuary 28, 2003
Term endedNovember 24, 2012
Patent numberCA 2121789 C
Classification (IPC)F25B15/06 +2 more

Timeline

Timeline From CIPO dates

1993199519971999200120032005200720092011Application filedNov 24, 1992Patent grantedJan 28, 2003Term endedNov 24, 2012

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