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Expired Canadian patentCanada

Cordierite refractory compositions and method of forming same

CA 1063625 A · Owner: General Motors Corporation · Inventors: Somers, Arthur V.; Shukle, Archie A.; Berg, Morris

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Abstract From the Canadian patent

Abstract of the Disclosure:, Cordierite refractory compositions made from a mixture of talc, clay, calcined kyanite, alumina and water the com-, position being such as to result on firing in a body having cordierite as the major crystalline phase and mullite as the minor crystalline phase and wherein the amount of Na2O and K2O is not in excess of about 0.14% by weight of the batch dry materials, such compositions being suitable for making a catalyst substrate or support in the form of an extruded multi-tubular refractory body as well as other ceramic bodies such as turbine engine components, heat exchanger cores and furnace ware which have a requirement for high resistance to heat shock and …

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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 2, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 2, 1996.
  • 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—
GrantedOctober 2, 1979
Term endedOctober 2, 1996
Patent numberCA 1063625 A
Classification (IPC)C04B35/64 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedOct 2, 1979Term endedOct 2, 1996

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