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Expired Canadian patentCanada

Fin tube distribution nozzle

CA 1075678 A · Owner: Ecodyne Corporation · Inventors: Sylvester, John L.

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 spray nozzle with a discharge surface defined by the formula X = ? 0.875D-t-0.5-, with D being the outside diameter of a connected heat exchanger tube and t being the, thickness of such heat exchanger tube does not create sufficient, back pressure to destroy the thin film layer of liquid flowing down the inside of such heat exchanger tube.

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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 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 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—
GrantedApril 15, 1980
Term endedApril 15, 1997
Patent numberCA 1075678 A
Classification (IPC)F28F27/00 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedApril 15, 1980Term endedApril 15, 1997

Sources & verification

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