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Expired Canadian patentCanada

Process for the production of wood fibre panels

CA 1284090 C · Owner: Hornitex Werke Gebr. Kunnemeyer Gmbh & Co. Kg. · Inventors: Kunnemeyer, Otto

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 process for the production of wood fibre panels is described, wherein the greater portion of the outer layers which are to be removed by grinding in the manner known heretofore, consists not of wood fibres but of wood dust of a, specific particle size a material that is disposed of as waste in other wood consolidates. The use of the process according to the present invention makes it possible to achieve a very small diminution of density towards the centre of the panel so that, this process is particularly well suited for the production of medium thick wood fibre panels weighing 600 to 950 kg/m3.

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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 May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 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.
FiledAugust 28, 1987
GrantedMay 14, 1991
Term endedMay 14, 2008
Patent numberCA 1284090 C
Classification (IPC)B27N3/18 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedAug 28, 1987Patent grantedMay 14, 1991Term endedMay 14, 2008

Sources & verification

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