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Expired Canadian patentCanada

Method and apparatus for removal of fly ash from a waste incinerator with liquid slag discharge

CA 1103522 A · Owner: Von Roll A.G. · Inventors: Kiefer, Gerhard; Kurt, Pierre

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Abstract From the Canadian patent

After the fly ash is removed from the flue gases by a separator, it is introduced into a combustion chamber which may be either the primary combustion chamber of the furnace or a separate chamber in a secondary combustion chamber. There it is burned until only the liquid slag remains and then removed, along with the other liquid slag formed in the furnace by the primary combustion process. Various methods and apparatus are described for carrying out the introduction of the fly ash into the combustion chamber. They include: packing the fly ash into separate metal containers to be introduced into a rotating primary combustion chamber of the furnace; mixing the ash with fuel and introducing it …

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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 June 23, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 5, 1978
GrantedJune 23, 1981
Term endedJune 23, 1998
Patent numberCA 1103522 A
Classification (IPC)F23G7/06 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedApril 5, 1978Patent grantedJune 23, 1981Term endedJune 23, 1998

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