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Expired Canadian patentCanada

Screen segment for filters for thickening fiber suspensions

CA 1324344 C · Owner: Schafer, Waldemar · Inventors: Schafer, Waldemar; Hauff, Siegfried

CIPO record

Overview

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

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Abstract From the Canadian patent

In a sector-shaped screen segment for disk filters or thickeners with a folded screen for thickening fiber suspensions comprising a frame, two screen carriers and a screen resting on the outer sides of the screen carriers manufacture is rendered simpler and less expensive by the frame and the screen carriers forming an integral molded part in which the screen is embedded in the molding process.

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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 November 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 2010.
  • 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 12, 1988
GrantedNovember 16, 1993
Term endedNovember 16, 2010
Patent numberCA 1324344 C
Classification (IPC)D21C9/18 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedFeb 12, 1988Patent grantedNov 16, 1993Term endedNov 16, 2010

Sources & verification

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