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Expired Canadian patentCanada

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CA 108917 A · Owner: Duryea, Chester Burnell · Inventors: Duryea, Chester Burnell

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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 December 3, 1907. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 1924.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 9, 1907
GrantedDecember 3, 1907
Term endedDecember 3, 1924
Patent numberCA 108917 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190819101912191419161918192019221924Application filedSep 9, 1907Patent grantedDec 3, 1907Term endedDec 3, 1924

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.