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Expired Canadian patentCanada

Comminution/recovery ore mill

CA 1285919 C · Owner: Rayner, Martin Arthur · Inventors: Rayner, Martin Arthur

CIPO record

Overview

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

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Abstract From the Canadian patent

A mill for comminution and separation of lump ore and subsequent recovery of relatively dense components of the ore, said mill including a stationary housing defining an ore reduction chamber therewithin, an impactor rotor drum rotatably mounted within said housing, said rotor drum supporting a plurality of circumferentially spaced ore breaker hammers and fixedly supporting a plurality of vanes for directing a high velocity air stream around said ore reduction chamber and defining a central feed region therewithin for receiving said lump ore a, plurality of transverse ore breaker plates fixedly supported within said housing and radially spaced from said rotor drum, an autogenous region in …

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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 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 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.
FiledMay 1, 1989
GrantedJuly 9, 1991
Term endedJuly 9, 2008
Patent numberCA 1285919 C
Classification (IPC)B02C13/04 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedMay 1, 1989Patent grantedJuly 9, 1991Term endedJuly 9, 2008

Sources & verification

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