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Expired Canadian patentCanada

Liquid phase bonded amorphous materials and process for preparation thereof

CA 1264508 C · Owner: Dresser Industries, Inc. · Inventors: Scruggs, David M.

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Abstract From the Canadian patent

A process for bonding together two or more pieces of material, at least one of which is an amorphous material, wherein an intermediate interlayer is placed between the two pieces and the assembly is hot pressed at a temperature above the melting point of the interlayer but below the crystallization temperature of the amorphous piece. The composition of the interlayer is chosen so that the elements diffusing into the pieces being bonded are compatible with retention of the amorphous structure. When the bonding operation is carried to completion, no evidence of the interlayer as a separate phase remains. Alternatively the bonding, operation may be halted before completion and the interlayer …

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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 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
  • 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 13, 1985
GrantedJanuary 23, 1990
Term endedJanuary 23, 2007
Patent numberCA 1264508 C
Classification (IPC)C09J1/00 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedFeb 13, 1985Patent grantedJan 23, 1990Term endedJan 23, 2007

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