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Expired Canadian patentCanada

Method and apparatus for settling sludge

CA 1320111 C · Owner: Kolene Corporation · Inventors: Cole, John M.

CIPO record

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Abstract From the Canadian patent

A method and apparatus for improved settling and handling of sludge in a fused salt bath for treating materials is provided. The apparatus includes a tank divided into a work zone and a salt processing zone, with the salt processing zone having a salt recovery section and a salt heating section. A pumping device is provided which together with adjustable gate means generate a relatively quiescent flow in the work zone allowing sludge to settle, and a relatively turbulent flow in the salt processing zone and especially the salt heating section to keep, the sludge in suspension.

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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 July 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 13, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 20, 1988
GrantedJuly 13, 1993
Term endedJuly 13, 2010
Patent numberCA 1320111 C
Classification (IPC)C21D1/46 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 20, 1988Patent grantedJuly 13, 1993Term endedJuly 13, 2010

Sources & verification

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