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Expired Canadian patentCanada

Heat exchanger

CA 1076554 A · Owner: Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft · Inventors: Kraetschmer, Liselotte; Heeren, Hermann

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Heat exchanger for indirect recooling of a heat transfer medium e.g. water by air wherein the heat transfer medium has a relatively high heat transfer coefficient compared to air characterized by two end walls, in parallel and provided with holes allied side walls with heat transfer, medium inlet and outlet as well as non-finned tubes with air flowing through them disposed between and sealed against said end walls.

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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 April 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedApril 29, 1980
Term endedApril 29, 1997
Patent numberCA 1076554 A
Classification (IPC)F28D7/00 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedApril 29, 1980Term endedApril 29, 1997

Sources & verification

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