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Expired Canadian patentCanada

Gas turbine regenerator

CA 1069884 A · Owner: Foster Wheeler Limited · Inventors: Ruhe, Anthony; Steel, Robert R.; Varney, John W.

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

A heat exchanger in which a plurality of tubes are supported in a spaced parallel relationship between two tube sheets. A conduit is provided in a parallel relation to the tubes for supplying a fluid to the tubes and the arrangement, is such that one of the tube sheets is fixed relative to the conduit and the other tube sheet moves relative to the conduit to accommodate thermal expansion and contraction of the tubes. A support unit is provided for supporting the tubes in a spaced parallel relationship while allowing fluid to pass between the tubes.

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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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 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—
GrantedJanuary 15, 1980
Term endedJanuary 15, 1997
Patent numberCA 1069884 A
Classification (IPC)F28D15/00 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJan 15, 1980Term endedJan 15, 1997

Sources & verification

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