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Expired Canadian patentCanada

Process for fabrication of high impact strength composites

CA 1069658 A · Owner: Trw Inc. · Inventors: Melnyk, Paul

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

An improved method for treating surfaces of aluminum sheets and in particular, boron reinforced aluminum sheets to render, such sheets more amenable to diffusion bonding which consists in contacting the sheets prior to such diffusion bonding with an aqueous solution containing chloride ions to thereby cause etch pitting on the surfaces.

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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 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
  • 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—
GrantedJanuary 15, 1980
Term endedJanuary 15, 1997
Patent numberCA 1069658 A
Classification (IPC)B23K20/00 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJan 15, 1980Term endedJan 15, 1997

Sources & verification

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