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Expired Canadian patentCanada

Chimney top and ventilator

CA 78159 A · Owner: Beckman, Carl H.A. · Inventors: Le Beau, John F.

CIPO record

Overview

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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 November 11, 1902. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 11, 1919.
  • 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 9, 1902
GrantedNovember 11, 1902
Term endedNovember 11, 1919
Patent numberCA 78159 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190319051907190919111913191519171919Application filedJune 9, 1902Patent grantedNov 11, 1902Term endedNov 11, 1919

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.