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Expired Canadian patentCanada

Railway crossing

CA 92467 A · Owner: Campbell, Argyle · Inventors: Campbell, Argyle

CIPO record

Overview

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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 4, 1905. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 1922.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 20, 1905
GrantedApril 4, 1905
Term endedApril 4, 1922
Patent numberCA 92467 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190619081910191219141916191819201922Application filedJan 20, 1905Patent grantedApril 4, 1905Term endedApril 4, 1922

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.