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Expired Canadian patentCanada

Propeller

CA 55697 A · Owner: Wittram, Frederick · Inventors: Wittram, Frederick

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 23, 1897. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 1914.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 4, 1896
GrantedApril 23, 1897
Term endedApril 23, 1914
Patent numberCA 55697 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

189718991901190319051907190919111913Application filedDec 4, 1896Patent grantedApril 23, 1897Term endedApril 23, 1914

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.