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Expired Canadian patentCanada

Method and composition for bonding solid lignocellulosic material

CA 1248654 A · Owner: Jansky, John · Inventors: Stofko, John

CIPO record

Overview

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

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Abstract From the Canadian patent

Wood surfaces are bonded together by heating and pressing with a bonding composition containing on a, bonding agent solids basis, from 2% to 80% of one or more sugars and from 20% to 98% of an aldehyde condensation resin, especially urea-formaldehyde or phenol-formaldehyde.

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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 January 10, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 10, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 2, 1984
GrantedJanuary 10, 1989
Term endedJanuary 10, 2006
Patent numberCA 1248654 A
Classification (IPC)B32B23/00 +2 more

Timeline

Timeline From CIPO dates

19851988199119941997200020032006Application filedMay 2, 1984Patent grantedJan 10, 1989Term endedJan 10, 2006

Sources & verification

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