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Expired Canadian patentCanada

Knife cleaning machine

CA 73809 A · Owner: Williams, Edward · Inventors: Williams, Edward

CIPO record

Overview

Drawings and full text

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 November 19, 1901. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 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.
FiledMarch 15, 1901
GrantedNovember 19, 1901
Term endedNovember 19, 1918
Patent numberCA 73809 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190219041906190819101912191419161918Application filedMarch 15, 1901Patent grantedNov 19, 1901Term endedNov 19, 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.