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Expired Canadian patentCanada

Method and apparatus for pretreating and debarking logs

CA 1306171 C · Owner: Beloit Technologies, Inc. · Inventors: Kutilin, Eugene E.

CIPO record

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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 method and apparatus are disclosed for pretreating logs with bark thereon prior to a conventional debarker and, for removing the bark from a log without the need for conventional debarkers. A plurality of intersecting helical cuts are performed, penetrating the bark layer thereby, defining discrete bark pieces of nominal size. When practiced without the need for conventional debarking apparatus, the present invention includes scraping tools for dislodging the bark from the log.

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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 August 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
  • 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 9, 1988
GrantedAugust 11, 1992
Term endedAugust 11, 2009
Patent numberCA 1306171 C
Classification (IPC)B27L1/00

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedNov 9, 1988Patent grantedAug 11, 1992Term endedAug 11, 2009

Sources & verification

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