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Expired Canadian patentCanada

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CA 187693 A · Owner: Baldwin, Edwin Charles · Inventors: Baldwin, Edwin Charles

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 3, 1918. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 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.
FiledDecember 28, 1916
GrantedDecember 3, 1918
Term endedDecember 3, 1935
Patent numberCA 187693 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

1917191919211923192519271929193119331935Application filedDec 28, 1916Patent grantedDec 3, 1918Term endedDec 3, 1935

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.