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Expired Canadian patentCanada

Prevention of low temperature corrosion

CA 1085243 A · Owner: The Babcock & Wilcox Company · Inventors: Williams, Keith R.

CIPO record

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

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Abstract From the Canadian patent

An arrangement for inhibiting low temperature gasside corrosion of an out of service steam generator and its heat exchange and gas clean-up adjuncts. The arrangement provides for circulating pressurized heated air through the steam generator and its adjuncts, controlling the pressurization of the air to maintain positive gas-side pressure controlling the, heating of the air to maintain gas-side surfaces above the dew point, and returning the air which has passed through the steam generator and its adjuncts to the forced draft fan to be repressurized, reheated and reintroduced into the steam generator.

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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 September 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 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.
FiledNovember 30, 1978
GrantedSeptember 9, 1980
Term endedSeptember 9, 1997
Patent numberCA 1085243 A
Classification (IPC)F22B1/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedNov 30, 1978Patent grantedSep 9, 1980Term endedSep 9, 1997

Sources & verification

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