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Expired Canadian patentCanada

Wood treating method and apparatus for facilitating removal of ferrous materials therefrom

CA 1202686 A · Owner: Detrick, Jeffrey C. · Inventors: Detrick, Jeffrey C.

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

Abstract Of The Disclosure, Pallet nails are subjected to induction heating to char the wood therearound. A pair of induction coils are brought into engagement with the frame pieces of the pallet and with the boards nailed to the frame pieces such as to place the nails within the eddy currents of the electric radio frequency field surrounding the coils. The nails become red hot instantaneously and within a n-latter of a few seconds the wood is so fully charred along the nails that they either fall from place or can be easily and quickly removed from the soft, highly porous charred substances.

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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 April 1, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 1, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 27, 1983
GrantedApril 1, 1986
Term endedApril 1, 2003
Patent numberCA 1202686 A
Classification (IPC)H05B6/10

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedSep 27, 1983Patent grantedApril 1, 1986Term endedApril 1, 2003

Sources & verification

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