Multi-layer absorbent composite
CA 2092605 C · Owner: Wanek, Mary Chris · Inventors: Van Den Bogart, Thomas William; Wanek, Mary Chris; Ribble, Brendon Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an absorbent structure comprising first and second surge management layers and an absorbent layer located between said first and second surge management layers. The first surge management layer comprises synthetic polymeric fibers and the second surge management layer comprises hydrophilic fibers. The density of the absorbent layer is greater than the density of the first and second surge management layers.
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 March 12, 1993 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2015.
- 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.