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Expired Canadian patentCanada

Water heater

CA 189331 A · Owner: Becker, Hugo A. · Inventors: Dukelow, Alfred D.; Becker, Hugo 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 March 25, 1919. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 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.
FiledOctober 28, 1918
GrantedMarch 25, 1919
Term endedMarch 25, 1936
Patent numberCA 189331 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

191919211923192519271929193119331935Application filedOct 28, 1918Patent grantedMarch 25, 1919Term endedMarch 25, 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.