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Expired Canadian patentCanada

Mechanism for operating casement windows

CA 98809 A · Owner: Spencer, Robert C. · Inventors: Spencer, Robert C.

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 May 1, 1906. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 1923.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 26, 1906
GrantedMay 1, 1906
Term endedMay 1, 1923
Patent numberCA 98809 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190719091911191319151917191919211923Application filedMarch 26, 1906Patent grantedMay 1, 1906Term endedMay 1, 1923

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.