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Expired Canadian patentCanada

Non-woven textile with liquid wicking or run-off effect

CA 1202453 A · Owner: Freudenberg, Carl · Inventors: Ruzek, Ivo; Hartmann, Ludwig

CIPO record

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Abstract From the Canadian patent

A non-woven textile material of synthetic fibres for use as a covering for liquid absorbant material with good run-off properties for movement of liquid to the absorbant material and also good properties against rewetting by liquid then held by the absorbant material. The cationic active surfactant is applied to the surface of the fibres or to the covering and which is, chemosorbable in cellulose in the absorbant layers. The surfactant has the general formula:, where R1 to R4 are selected from alkylaryl-, alkylaryl -, ethoxyl-, alkylethoxylarylethoxyl- and/or alkylarylethoxyl- radicals and A is a suitable anion e.g. a halide.

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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 1, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 1, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 27, 1981
GrantedApril 1, 1986
Term endedApril 1, 2003
Patent numberCA 1202453 A
Classification (IPC)D04H1/58

Timeline

Timeline From CIPO dates

19821985198819911994199720002003Application filedNov 27, 1981Patent grantedApril 1, 1986Term endedApril 1, 2003

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