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Expired Canadian patentCanada

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CA 74716 A · Owner: Sosna, Leopold Rudolph · Inventors: Sosna, Leopold Rudolph; Sosna, Rudolph Joseph

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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 February 11, 1902. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 1919.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 23, 1902
GrantedFebruary 11, 1902
Term endedFebruary 11, 1919
Patent numberCA 74716 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190319051907190919111913191519171919Application filedJan 23, 1902Patent grantedFeb 11, 1902Term endedFeb 11, 1919

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.