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Expired Canadian patentCanada

Multi-ply paper towel with absorbent core

CA 2603746 C · Owner: Fort James Corporation · Inventors: Mccullough, Stephen J.; Edwards, Steven L.; Super, Guy H.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A multi-ply absorbent sheet of cellulosic fiber with continuous outer surfaces is provided an absorbent core between the outer surfaces. The absorbent core includes a non-woven fiber network having: (i) a plurality of pileated fiber enriched regions of relatively high local basis weight interconnected by way of (ii) a plurality of lower local basis weight linking regions whose fiber orientation is biased along the direction between pileated regions interconnected thereby, and (iii) a plurality of fiber-deprived cellules between the fiber enriched and linking regions also being characterized by a , local basis weight lower than the fiber enriched regions. The cellules provide a …

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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

  • Filed April 13, 2006 and granted November 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 13, 2026.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 13, 2006
GrantedNovember 12, 2013
Term endedApril 13, 2026
Patent numberCA 2603746 C
Classification (IPC)B31F1/12 +1 more

Timeline

Timeline From CIPO dates

2007200920112013201520172019202120232025Application filedApril 13, 2006Patent grantedNov 12, 2013Term endedApril 13, 2026

Sources & verification

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