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Expired Canadian patentCanada

Valve for engines

CA 184530 A · Owner: Blaylock, John · Inventors: Blaylock, John

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 28, 1918. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 1935.
  • 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 25, 1916
GrantedMay 28, 1918
Term endedMay 28, 1935
Patent numberCA 184530 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

1917191919211923192519271929193119331935Application filedSep 25, 1916Patent grantedMay 28, 1918Term endedMay 28, 1935

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.