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Expired Canadian patentCanada

Surface bonding of ceramic bodies

CA 1309232 C · Owner: Newkirk, Marc S. · Inventors: Newkirk, Marc S.; Urquhart, Andrew W.; Luszcz, Stanley J.

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Abstract From the Canadian patent

Stanley J. LUSZCZ, Marc S. NEWKIRK Andrew W. URQUHART, ABSTRACT, Ceramic bodies are bonded together via a layer of an oxidation reaction product of a molten metal which metal is, present in one or both of the ceramic bodies prior to bonding. At least one of the ceramic bodies comprises a ceramic product formed by the oxidation reaction of molten parent metal (e.g. alumina from molten aluminum) and grown as molten metal is transported through and oxidized on the, surface of, its own oxidation product. One or both of the ceramic bodies used in the bonding process contains surface-accessible channels of residual metal i.e. metal, channels which have resulted from molten-metal transport during …

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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 October 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 15, 1987
GrantedOctober 27, 1992
Term endedOctober 27, 2009
Patent numberCA 1309232 C
Classification (IPC)C04B37/00 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedSep 15, 1987Patent grantedOct 27, 1992Term endedOct 27, 2009

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