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Expired Canadian patentCanada

Ball grinding machine

CA 64446 A · Owner: Schulze, Robert · Inventors: Schulze, Leon F.; Schulze, Robert

CIPO record

Overview

Drawings and full text

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 October 18, 1899. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 18, 1916.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 10, 1899
GrantedOctober 18, 1899
Term endedOctober 18, 1916
Patent numberCA 64446 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190019021904190619081910191219141916Application filedApril 10, 1899Patent grantedOct 18, 1899Term endedOct 18, 1916

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.