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CA 175809 A · Owner: Marrs, Edward F. · Inventors: Marrs, Edward F.

CIPO record

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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.

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Why it's free to use

  • Granted March 20, 1917. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 1934.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 18, 1915
GrantedMarch 20, 1917
Term endedMarch 20, 1934
Patent numberCA 175809 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

1916191819201922192419261928193019321934Application filedOct 18, 1915Patent grantedMarch 20, 1917Term endedMarch 20, 1934

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.