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Expired Canadian patentCanada

Device for the exchange of heat between supply air and exhaust air in indoor premises

CA 1097337 A · Owner: Aktiebolaget Carl Munters · Inventors: Hedbom, Hans

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 heat exchange system in which sensible and/or latent heat is exchanged between a stream of incoming air into an enclosure and a stream of air leaving the enclosure comprising a heat ex-, changer for the incoming air and a heat exchanger for the leaving air, each of said exchangers comprising a group of passages through which the incoming air stream and the leaving air stream respect-, ively, flow in heat exchange relationship with a liquid passing through a separate group of passages. The liquid is circulated in a closed circuit between the two exchangers in a duct leading from the heat exchanger for the incoming air to the heat exchanger for the leaving air, and, upon heat exchange 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 March 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 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.
FiledDecember 16, 1977
GrantedMarch 10, 1981
Term endedMarch 10, 1998
Patent numberCA 1097337 A
Classification (IPC)F28D21/00 +1 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedDec 16, 1977Patent grantedMarch 10, 1981Term endedMarch 10, 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.