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Expired Canadian patentCanada

Method and apparatus for obtaining maximum spray flow limit of attemperators

CA 1234918 A · Owner: The Babcock & Wilcox Company · Inventors: Barkan, James L.

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Abstract From the Canadian patent

An apparatus and method determines maximum spray flow limit for an attemperator by using attemperator inlet pressure and temperature to calculate enthalpy. The enthalpy contributed by water spray flow to the attemperator is also used in the calculation to determine enthalpy per unit load. The enthalpy per unit load is multiplied by the actual load of the boiler being serviced by the attemperator to produce a maximum spray flow limit for the attemperator. -12-

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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 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 5, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 6, 1985
GrantedApril 5, 1988
Term endedApril 5, 2005
Patent numberCA 1234918 A
Classification (IPC)F22G5/12 +1 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedNov 6, 1985Patent grantedApril 5, 1988Term endedApril 5, 2005

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