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Expired Canadian patentCanada

Device for opening or closing elevator doors

CA 91775 A · Owner: The Elevator Airbrake And Equipment Company · Inventors: Mckenie Jenkins, Howard

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 February 28, 1905. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 28, 1922.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 31, 1905
GrantedFebruary 28, 1905
Term endedFebruary 28, 1922
Patent numberCA 91775 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190619081910191219141916191819201922Application filedJan 31, 1905Patent grantedFeb 28, 1905Term endedFeb 28, 1922

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.