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Expired Canadian patentCanada

Fluid pervious, dispersible, and flushable webs having improved functional surface

CA 2187391 C · Owner: Dirk, Raymond John · Inventors: Ahr, Nicholas Albert; Dirk, Raymond John

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

The present invention provides a fluid pervious web which disperses into fragments which are readily flushable in a normal toilet. The web preferably comprises a wetlaid apertured tissue having a temporary wet strength resin incorporated therein. The web preferably further includes a plurality of individual fibrils on a body-facing surface thereof so as to provide a clean and dry tactile impression in use. The fibrils serve to separate the wearer's skin from the underlying tissue substrate in use. In a preferred embodiment the web substrate is hydrophilic in nature while the fibrils themselves are hydrophobic in nature so as to provide enhanced dryness at the uppermost' surface while …

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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 October 8, 1996 and granted December 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 8, 1996
GrantedDecember 19, 2000
Term endedOctober 8, 2016
Patent numberCA 2187391 C
Classification (IPC)A61F13/15 +2 more

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedOct 8, 1996Patent grantedDec 19, 2000Term endedOct 8, 2016

Sources & verification

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