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Expired Canadian patentCanada

Partitions for a tube grinding mill

CA 1102290 A · Owner: Slegten, Pierre A. · Inventors: Slegten, Pierre A.

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

The invention relates to improvements to the partitions for a tube grinding mill having grinding media as described and claimed in Canadian patent Nr. 971,144. The improvement consists in that the deflector member is constituted by the scoops themselves which pass through the openings formed in the polygonal envelope and extend into the interior of the said envelope precisely by, the ends of the scoops penetrating into the polygonal envelope.

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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 June 2, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 24, 1978
GrantedJune 2, 1981
Term endedJune 2, 1998
Patent numberCA 1102290 A
Classification (IPC)B02C17/02 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedFeb 24, 1978Patent grantedJune 2, 1981Term endedJune 2, 1998

Sources & verification

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