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Expired Canadian patentCanada

Apparatus and method for fabricating structural panels having corrugated core structures and panel formed therewith

CA 1333685 C · Owner: General Electric Company · Inventors: Inzinna, Louis Paul

CIPO record

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Abstract From the Canadian patent

An apparatus and method for continuously fabricating lightweight structural panels and the structural panel fabricated thereby are provided, the apparatus being capable of heating a core sheet to a temperature at which the sheet will be plastically deformable such that a corrugation forming means comprising a cylindrical forming drum having a plurality of annular recesses and a plurality of forming mandrels will form a plurality of axially extending corrugations. The fabricating apparatus is further provided with heaters to heat the surfaces of the core sheet and one or, two skin sheets to be bonded to the core sheet the core, sheet being heated to a process temperature at which the …

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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 December 27, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 27, 2011.
  • 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 11, 1989
GrantedDecember 27, 1994
Term endedDecember 27, 2011
Patent numberCA 1333685 C
Classification (IPC)B32B3/28 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMay 11, 1989Patent grantedDec 27, 1994Term endedDec 27, 2011

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