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Expired Canadian patentCanada

Nut lock

CA 117828 A · Owner: De Tray, Floyd Wm. · Inventors: Mckenna, Dennis W.; De Tray, Floyd Wm.

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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 April 20, 1909. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 20, 1926.
  • 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 19, 1909
GrantedApril 20, 1909
Term endedApril 20, 1926
Patent numberCA 117828 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

191019121914191619181920192219241926Application filedMarch 19, 1909Patent grantedApril 20, 1909Term endedApril 20, 1926

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.