Apertured macroscopically expanded three-dimensional polymeric web exhibiting breatheability and resistance to fluid transmission
CA 1290537 C · Owner: The Procter & Gamble Company · Inventors: Thompson, Hugh Ansley
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 particularly, preferred embodiment to an apertured, macroscopically, expanded resilient three-dimensional polymeric web which is believed to have particular utility as a breatheable barrier for a disposable bandage such as a diaper. The web preferably comprises a deeply drawn three-dimensional structure containing a multiplicity of debossments of macroscopic (i.e. visibly perceivable by the normal human eye at a perpendicular distance of about one foot) cross-section each, of said debossments originating as an aperture in a first surface of the web and having a continuously interconnected side wall extending in the direction of a second remotely, located …
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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 October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
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Timeline
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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.