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Expired Canadian patentCanada

Method of controlling heat input to a waste heat boiler

CA 1091182 A · Owner: Nippon Kokan Kabushiki Kaisha · Inventors: Koizumi, Kunihei; Ueda, Takeshi; Otani, Tatu

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

In a coke dry quenching system arranging a waste heat boiler, the sensible heat of bleeder gas from a top portion of a coke dry quenching station at a time of overheat is stored in a regenerator and regenerated heat is automatically conducted to a waste heat boiler corresponding to lowering of heat input brought about by a change of coke pushing interval from the oven so that constant heat input to the waste heat boiler is maintained at a constant level.

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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 December 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 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.
FiledJanuary 12, 1977
GrantedDecember 9, 1980
Term endedDecember 9, 1997
Patent numberCA 1091182 A
Classification (IPC)C10B39/02 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJan 12, 1977Patent grantedDec 9, 1980Term endedDec 9, 1997

Sources & verification

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