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Expired Canadian patentCanada

Calk for horseshoes

CA 134975 A · Owner: Cottrell, Frederick W. · Inventors: Cottrell, Frederick W.

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 August 15, 1911. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 15, 1928.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 6, 1911
GrantedAugust 15, 1911
Term endedAugust 15, 1928
Patent numberCA 134975 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

191219141916191819201922192419261928Application filedFeb 6, 1911Patent grantedAug 15, 1911Term endedAug 15, 1928

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.