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Expired Canadian patentCanada

Apparatus for charging a shaft furnace

CA 1306606 C · Owner: Beckenbach, Ulrich · Inventors: Hergarten, Werner; Beckenbach, Ulrich; Beckenbach, Helmuth

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

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Abstract From the Canadian patent

Apparatus for charging a shaft furnace for calcining and sintering material in lump form, such as limestone dolomite, magnesite or the like, with granular bulk material with a, charging silo arranged above the furnace shaft having a substantially circular cross-section with a substantially homogeneously mixed bulk material and a charging bunker outlet for supplying the bulk material onto the surface of the bulk material column to be covered in the furnace shaft in a distribution controllable over the shaft diameter characterized by a substantially circular plate arranged in spaced manner below the charging bunker outlet and whose diameter is smaller than the internal diameter of the furnace …

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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 August 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 20, 1986
GrantedAugust 25, 1992
Term endedAugust 25, 2009
Patent numberCA 1306606 C
Classification (IPC)F27B1/20 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedAug 20, 1986Patent grantedAug 25, 1992Term endedAug 25, 2009

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