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Expired Canadian patentCanada

Method for producing composite ceramic structures

CA 1309575 C · Owner: Lanxide Technology Company, Lp · Inventors: Dwivedi, Ratnesh K.; White, Danny R.; Newkirk, Marc S.

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

A method for producing a self-supporting ceramic composite which comprises preparing a polycrystalline material as the oxidation reaction product of a parent metal with a vapor-phase oxidant, comminuting the resulting material to a particulate, forming a permeable mass of said particulate as filler, and infiltrating said particulate with an oxidation reaction product of a parent metal with a vapor-phase oxidant, thereby forming said ceramic composite.

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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 November 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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
GrantedNovember 3, 1992
Term endedNovember 3, 2009
Patent numberCA 1309575 C
Classification (IPC)C04B35/65

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedSep 15, 1987Patent grantedNov 3, 1992Term endedNov 3, 2009

Sources & verification

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