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Expired Canadian patentCanada

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CA 86471 A · Owner: Kempshall, Eleazer · Inventors: Kempshall, Eleazer

CIPO record

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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 12, 1904. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 1921.
  • 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 9, 1902
GrantedApril 12, 1904
Term endedApril 12, 1921
Patent numberCA 86471 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

1903190519071909191119131915191719191921Application filedApril 9, 1902Patent grantedApril 12, 1904Term endedApril 12, 1921

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

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Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.com

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