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Expired Canadian patentCanada

Apparatus for manufacture of sheets or board units from cellulose or fibre material or shavings

CA 1051468 A · Owner: Defibrator Aktiebolag · Inventors: Asberg, Per; Falkinger, Willard

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

Apparatus for producing pressed board and the like in a tiered multi-opening press in which the blank supporting conveyor plates are moved successively between the loading end and the discharge end along a substantially rectangular split-level track pattern in which the longer side portions are located at a level different from that of the two shorter side portions. The loaded plates are introduced into the press at the level of the side portions and at the discharge end are moved to the level of the shorter end portions and conveyed transversely to the opposite corner where in turn they are moved to the level of the shorter end portions and conveyed transversely to the opposite corner and …

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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 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMarch 27, 1979
Term endedMarch 27, 1996
Patent numberCA 1051468 A
Classification (IPC)B27N3/22

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedMarch 27, 1979Term endedMarch 27, 1996

Sources & verification

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