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Expired Canadian patentCanada

Refractory materials

CA 1096892 A · Owner: United Kingdom Atomic Energy Authority · Inventors: Peckett, John W. A.

CIPO record

Overview

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

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Abstract From the Canadian patent

There is disclosed a process for the production of a refractory material which includes heating an intermediate material containing carbon to cause carbothermic reduction of a chemical substance within the intermediate material wherein, said intermediate material has been produced by heating a gel precipitated gel, and carbon in the intermediate material for the carbothermic reduction has been produced from gelling agent, or a derivative thereof, incorporated in the gel during gel precipitation.

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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 March 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 1998.
  • 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 30, 1977
GrantedMarch 3, 1981
Term endedMarch 3, 1998
Patent numberCA 1096892 A
Classification (IPC)C01B31/34 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedMarch 30, 1977Patent grantedMarch 3, 1981Term endedMarch 3, 1998

Sources & verification

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