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Expired Canadian patentCanada

Method and apparatus for the utilization of the heat of melting of water

CA 1300901 C · Owner: Wallen, Gustav · Inventors: Wallen, Gustav

CIPO record

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Abstract From the Canadian patent

This publication describes a method and an apparatus for the utilization of the heat of melting of water. In accordance with the method, the gaseous heat transfer medium is led into a turbine (2) where the medium is expanded to a lower pressure. The heat medium is led to a container (5) where water is conveyed via a pipe (6), the heat medium with heat energy stored into it from the water is led from an upper part (14 of the container (5) to a compressor (16) where the medium is compressed to a higher pressure by means of energy obtained from the turbine (2) via a turbine shaft (3) and from a motor (18) via a shaft (17), and the heated medium is led out from the system. In accordance with …

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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 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 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.
FiledJanuary 29, 1987
GrantedMay 19, 1992
Term endedMay 19, 2009
Patent numberCA 1300901 C
Classification (IPC)F25B9/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJan 29, 1987Patent grantedMay 19, 1992Term endedMay 19, 2009

Sources & verification

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