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Expired Canadian patentCanada

Cleaner for disc drills

CA 83709 A · Owner: Poirier, Octave A. · Inventors: Poirier, Octave A.

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 3, 1903. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1920.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 28, 1903
GrantedNovember 3, 1903
Term endedNovember 3, 1920
Patent numberCA 83709 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190419061908191019121914191619181920Application filedSep 28, 1903Patent grantedNov 3, 1903Term endedNov 3, 1920

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.