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Expired Canadian patentCanada

Process and apparatus for mercerising cotton in form of hanks

CA 68031 A · Owner: Kleinewefers, Wilhelm · Inventors: Kleinewefers, Wilhelm

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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 July 9, 1900. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 1917.
  • 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 29, 1897
GrantedJuly 9, 1900
Term endedJuly 9, 1917
Patent numberCA 68031 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

1898190019021904190619081910191219141916Application filedDec 29, 1897Patent grantedJuly 9, 1900Term endedJuly 9, 1917

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.