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Expired Canadian patentCanada

Congruently melting complex oxides

CA 1306408 C · Owner: Abrahams, Sydney Cyril · Inventors: Brandle, Charles David, Jr.; Abrahams, Sydney Cyril

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

Abstract, This invention is directed to a device comprising a material including a complex oxide of a congruent compositioin and involves the finding that the congruent composition of any complex oxide is non-stoichiometric. The congruent composition differs from stoichiometry by at least 0.1 atomic percent for each constituent element.

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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 August 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 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.
FiledApril 29, 1987
GrantedAugust 18, 1992
Term endedAugust 18, 2009
Patent numberCA 1306408 C
Classification (IPC)H01S3/16 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedApril 29, 1987Patent grantedAug 18, 1992Term endedAug 18, 2009

Sources & verification

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