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Expired Canadian patentCanada

Steam quality monitoring means and method

CA 1329269 C · Owner: Simpson, Richard Stephen · Inventors: Simpson, Richard Stephen; Dowling, Donald Joseph; Sims, Jackie Charles

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Abstract From the Canadian patent

STEAM QUALITY MONITORING MEANS AND METHOD (D#78,860-F), ABSTRACT, A steam quality monitor monitoring the quality of steam flowing in the pipe includes capacitance sensing apparatus which senses the capacitance of the flowing steam and provides a capacitance signal corresponding to the said capacitance. Another sensor which may be either a temperature sensor or a pressure sensor senses either the temperature or pressure of the steam and provides a representative type signal. Circuitry connected to the capacitance sensor and to the temperature or pressure sensor provides an output corresponding to the quality of steam in accordance with the capacitance and the temperature or pressure signal.

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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 3, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 12, 1989
GrantedMay 3, 1994
Term endedMay 3, 2011
Patent numberCA 1329269 C
Classification (IPC)G01R27/26 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJuly 12, 1989Patent grantedMay 3, 1994Term endedMay 3, 2011

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