Nonwoven fabric laminate having enhanced barrier properties
CA 2444496 A1 · Owner: Santisteban, Jorge A. · Inventors: Santisteban, Jorge A.; Guajardo Torres, Juana Rocio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nonwoven fabric laminate embodying the principles of the present invention is configured as a multi-layer construct of a plurality of melt-extrusion layers, including at least one, and preferably a pair of outer spunbond layers, and a central, melt-blown barrier layer juxtaposed to the outer spunbond layers. At least one of the layers preferably the melt-blown layer, comprises a barrier-enhancing melt additive compound having a fluoroalcohol with a non-derivatized additive such as a fatty acid more preferably a , derivatized perfluoroalcohol with a non-derivatized additive with a stearic , ester of perfluoroalcohol in a hydrogenated tallow amide additive being presently preferred.
Read the whole patent
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 11, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 11, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.