Absorbent article having zoned areas of hydrophilicity
CA 2466419 A1 · Owner: Erdman, Carol L. · Inventors: Erdman, Carol L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An absorbent article that provides leakage protection and/or skin protection as well as methods for using and preparing same and novel compositions and composites for use in same, is disclosed. The absorbent article comprises a selectively-permeable topsheet (40); a substantially impermeable backsheet (50); an absorbent core (8) positioned between said selectively-permeable topsheet (40) and said substantially impermeable backsheet (50). The selectively-permeable topsheet (40) has a treated hydrophilic zone (200) and an untreated hydrophobic zone (202).
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 November 12, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 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.