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Expired Canadian patentCanada

Tube mill liner

CA 193641 A · Owner: O'Shaughnessy, Martin Roderick · Inventors: O'Shaughnessy, Martin Roderick

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 4, 1919. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 4, 1936.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 16, 1919
GrantedNovember 4, 1919
Term endedNovember 4, 1936
Patent numberCA 193641 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

192019221924192619281930193219341936Application filedJune 16, 1919Patent grantedNov 4, 1919Term endedNov 4, 1936

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.