Patent Yard Sign in
Expired Canadian patentCanada

Calenders

CA 851465 A · Owner: Dominion Engineering Works Limited · Inventors: Thomas, Rex

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 September 15, 1970. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 1987.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 22, 1962
GrantedSeptember 15, 1970
Term endedSeptember 15, 1987
Patent numberCA 851465 A
Classification (IPC)B31F1/14 +2 more

Timeline

Timeline From CIPO dates

196319661969197219751978198119841987Application filedNov 22, 1962Patent grantedSep 15, 1970Term endedSep 15, 1987

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.