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Expired Canadian patentCanada

Machine felt, and a method for manufacturing same

CA 1295161 C · Owner: Halker, Vera · Inventors: Halker, Vera; Halker, Helmut

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

A machine felt, particularly felt for papermaking machines has a multi-ply support material extending over its entire length. The individual plies may be knit and at least one, of the belts of material overlaps itself forming two complete plies. In an intermediate segment of the belt there are folded edges that are joined together by coupling elements.

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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 February 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 4, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 23, 1987
GrantedFebruary 4, 1992
Term endedFebruary 4, 2009
Patent numberCA 1295161 C
Classification (IPC)D21F7/08 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedSep 23, 1987Patent grantedFeb 4, 1992Term endedFeb 4, 2009

Sources & verification

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