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Expired Canadian patentCanada

Concrete caisson

CA 102641 A · Owner: Mcalpine, Thomas Malcolm · Inventors: Mcalpine, Thomas Malcolm

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 December 18, 1906. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 18, 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.
FiledSeptember 21, 1906
GrantedDecember 18, 1906
Term endedDecember 18, 1923
Patent numberCA 102641 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190719091911191319151917191919211923Application filedSep 21, 1906Patent grantedDec 18, 1906Term endedDec 18, 1923

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

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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.