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Expired Canadian patentCanada

Method of reducing ores and refining metals

CA 125489 A · Owner: Stassano, Etnesto · Inventors: Stassano, Etnesto

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

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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.

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Why it's free to use

  • Granted May 3, 1910. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 1927.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 23, 1905
GrantedMay 3, 1910
Term endedMay 3, 1927
Patent numberCA 125489 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

19061909191219151918192119241927Application filedNov 23, 1905Patent grantedMay 3, 1910Term endedMay 3, 1927

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

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