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Expired Canadian patentCanada

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CA 84357 A · Owner: Johnson, George Doan · Inventors: Johnson, Jacob Henry; Johnson, George Doan

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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 15, 1903. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1920.
  • 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 25, 1903
GrantedDecember 15, 1903
Term endedDecember 15, 1920
Patent numberCA 84357 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190419061908191019121914191619181920Application filedNov 25, 1903Patent grantedDec 15, 1903Term endedDec 15, 1920

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.