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Expired Canadian patentCanada

Method for joining members at ordinary temperature

CA 2232647 C · Owner: Honda Giken Kogyo Kabushiki Kaisha · Inventors: Kuwabara, Mitsuo

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

When a metal member and a ceramic member are joined to one another, an aluminum nitride sintered compact is prepared. A liquid and a component which is mutually reactive with the liquid are applied onto the aluminum nitride sintered compact, and then a copper foil is laminated thereon. Subsequently, when the members are left to stand at room temperature, the liquid and the component mutually cause an exothermic reaction. The aluminum nitride sintered compact and the copper foil mutually diffuse and, they are tightly joined to one another. Accordingly the, members to be joined are not thermally affected and a, desired joining strength can be obtained by using simple equipment.

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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

  • Filed March 19, 1998 and granted September 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 19, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 19, 1998
GrantedSeptember 4, 2001
Term endedMarch 19, 2018
Patent numberCA 2232647 C
Classification (IPC)B32B7/12 +2 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedMarch 19, 1998Patent grantedSep 4, 2001Term endedMarch 19, 2018

Sources & verification

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