Patent Yard Sign in
Expired Canadian patentCanada

Furnace

CA 176972 A · Owner: Brown, William Hamilton · Inventors: Brown, William Hamilton

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Read the whole patent

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 May 17, 1917. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 1934.
  • 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 16, 1917
GrantedMay 17, 1917
Term endedMay 17, 1934
Patent numberCA 176972 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

191819201922192419261928193019321934Application filedFeb 16, 1917Patent grantedMay 17, 1917Term endedMay 17, 1934

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.