Method for forming laminate nonwoven fabric
CA 2430072 A1 · Owner: Ngai, Mou-Chung · Inventors: Ngai, Mou-Chung
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for creating a nonwoven laminate fabric with three laminated layers with top and bottom layers of thin veneer and a center layer of pulp resulting in a laminate fabric with particular utility as a flushable wipe. Figure 1 illustrates a hydroentangled nonwoven layer (20) provided on a moving support (22). A second nonwoven layer (24) is overlaid on top of first layer (20) and a third nonwoven layer (26) overlaid on top of second layer (24). Support (22) with the three layers thereon is then conveyed under manifold (28). For the utility in making flushable wipes unentangled regions (52) , between lines of entanglement (50) result in a laminate fabric that has a sufficient wet …
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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 November 29, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 29, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2023.
- 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.