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CA 55407 A · Owner: Dorken, Herman Walter · Inventors: Dorken, Herman Walter

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.

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Why it's free to use

  • Granted March 25, 1897. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 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
GrantedMarch 25, 1897
Term endedMarch 25, 1914
Patent numberCA 55407 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

189718991901190319051907190919111913Application filedDec 4, 1896Patent grantedMarch 25, 1897Term endedMarch 25, 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.