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Expired Canadian patentCanada

Water-removal element for the wet stage of a paper- making machine

CA 1235010 A · Owner: Feldmuhle Aktiengesellschaft · Inventors: Fuchs, Karl-Dieter

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A rail-shaped water-removal element for the wet stage of a water-removal machine, in particular a paper-making machine such as a mesh table, foil, couch roll wet suction roll, suction, roll, suction tube and suction felt is so shaped that the layer that is in sliding contact with the mesh or felt consists of individual segments of hard material such as sistered aluminum oxide and silicon carbide. These segments having devices for the installation of profile rails that extend transversely to the direction of movement felt or mesh of the machine the in-, dividual segments having at the ends of their longitudinal sides stepped jointing surfaces that extend across the whole width of the …

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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.

Why it's free to use

  • Granted April 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 23, 1984
GrantedApril 12, 1988
Term endedApril 12, 2005
Patent numberCA 1235010 A
Classification (IPC)D21F1/00 +2 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedFeb 23, 1984Patent grantedApril 12, 1988Term endedApril 12, 2005

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