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Expired Canadian patentCanada

Electrie bonds for street mains

CA 67166 A · Owner: Knudson, Adolphus Alvord · Inventors: Knudson, Adolphus Alvord

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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.

Google PatentsCIPO record

Why it's free to use

  • Granted April 30, 1900. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 30, 1917.
  • 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 17, 1900
GrantedApril 30, 1900
Term endedApril 30, 1917
Patent numberCA 67166 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190119031905190719091911191319151917Application filedMarch 17, 1900Patent grantedApril 30, 1900Term endedApril 30, 1917

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.