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Expired Canadian patentCanada

Energy attenuator and method of manufacturing thereof

CA 1115299 A · Owner: Budd Company (The) · Inventors: Epel, Joseph N.; Wilkinson, Robert E.; Mcdougall, Malcolm K.

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

An energy attenuator for absorbing impact of a foreign object against a body to be protected. The energy attenuator comprising a plurality of layers in a desired form or shape and each layer may be separated from the adjacent layer by films of high temperature resistant thermoplastic materials which are neither soluble in nor compatible with or modified by the molding conditions encountered in processing the laminates or layers. The energy attenuator may be manufactured by either a buildup process whereby each layer is formed, then separated by a separating material another layer is then, deposited upon the material forming a laminate structure which may be made to the desired thickness by …

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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 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 26, 1979
GrantedDecember 29, 1981
Term endedDecember 29, 1998
Patent numberCA 1115299 A
Classification (IPC)B60R19/26 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedFeb 26, 1979Patent grantedDec 29, 1981Term endedDec 29, 1998

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