A method for forming a laminate web
CA 2274692 C · Owner: Bien, Denise Jean · Inventors: Bien, Denise Jean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention pertains, in a preferred embodiment to a method for , forming a laminate web. The method includes the steps of: providing a nonwoven web (22) of fibers exhibiting a surface energy the nonwoven web (22) having a , first surface a second surface, and a plurality of fluid passageways placing the first and second surfaces in fluid communication with one another; applying a surface treatment (28) to the first surface of the nonwoven web the surface treatment (28) having a surface energy less than the surface energy of the fibers of the nonwoven web providing an apertured macroscopically expanded three-dimensional polymeric web (200); and joining the nonwoven web of …
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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 December 5, 1997 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2019.
- 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.