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Expired Canadian patentCanada

Feed attachments for pulp wood chippers

CA 67751 A · Owner: Butterfield, Samuel Wesley · Inventors: Butterfield, Samuel Wesley

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.

Google PatentsCIPO record

Why it's free to use

  • Granted June 15, 1900. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 15, 1917.
  • 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 25, 1899
GrantedJune 15, 1900
Term endedJune 15, 1917
Patent numberCA 67751 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190019021904190619081910191219141916Application filedSep 25, 1899Patent grantedJune 15, 1900Term endedJune 15, 1917

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.