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Expired Canadian patentCanada

Method of increasing the binding power of basic silicates of lime

CA 113842 A · Owner: Schumacher, Wilhelm · Inventors: Schumacher, 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 September 1, 1908. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 1925.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 23, 1907
GrantedSeptember 1, 1908
Term endedSeptember 1, 1925
Patent numberCA 113842 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

190819101912191419161918192019221924Application filedMay 23, 1907Patent grantedSep 1, 1908Term endedSep 1, 1925

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.