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Expired Canadian patentCanada

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CA 69925 A · Owner: Wintjen, Behrend · Inventors: Tisdale Clausen, Marjorie; Wintjen, Behrend

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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 January 22, 1901. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 1918.
  • 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 12, 1900
GrantedJanuary 22, 1901
Term endedJanuary 22, 1918
Patent numberCA 69925 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190119031905190719091911191319151917Application filedDec 12, 1900Patent grantedJan 22, 1901Term endedJan 22, 1918

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

Cross-check elsewhere

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.