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Expired Canadian patentCanada

Process and apparatus for comminuting using abrasive discs in a disc refiner

CA 1163126 A · Owner: The Research Foundation Of State University Of New York · Inventors: Marton, Renata; Brown, Alton F.

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

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Abstract From the Canadian patent

Abstract of the Disclosure An apparatus for comminuting a substance which comprises a rotatable disc having a disintegrating surface and a base surface proximate to and facing the disintegrating surface. The apparatus has a means for rotating the disc and for feeding particles of the substance between the disintegrating surface and base surface. At least one of the disintegrating surface and base surface comprise an abrasive and at least one of the base surface and disintegrating surface comprise breaker bars. The invention also includes a novel disc for use in a disc refiner having an abrasive disintegrating surface and a novel comminuting plate for use as part of such a disc. The …

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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 March 6, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2001.
  • 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 27, 1981
GrantedMarch 6, 1984
Term endedMarch 6, 2001
Patent numberCA 1163126 A
Classification (IPC)B02C7/12 +1 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedApril 27, 1981Patent grantedMarch 6, 1984Term endedMarch 6, 2001

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