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Expired Canadian patentCanada

Lance for injecting highly-loaded coal slurries into the blast furnace

CA 1291333 C · Owner: Italsider S.P.A. · Inventors: Illuminati, Duilio

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

A lance of simplified design compared to those currently used for injecting fuel oil which permits obtaining a good atomisation of highly-loaded coal-water and coal-tar slurries at very low flow rates. In addition the, new lance design prevents the build-up of deposits within the lance and therefore ensures a long service life and steadiness of the selected flow rate in time.

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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 October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2008.
  • 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 28, 1986
GrantedOctober 29, 1991
Term endedOctober 29, 2008
Patent numberCA 1291333 C
Classification (IPC)F27D3/16 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 28, 1986Patent grantedOct 29, 1991Term endedOct 29, 2008

Sources & verification

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