Topsheet for body fluids absorbent article
CA 2265282 C · Owner: Uni-Charm Corporation · Inventors: Shimizu, Shingo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A topsheet for body fluids absorbent article having a plurality of liquid-pervious apertures 6 the topsheet including an upper fibrous layer having a relatively low density and a lower fibrous layer having a relatively high density. Around each of the apertures 6 the first and second fibrous layers 11 12 are integrated together so that the topsheet 2 has a density progressively increasing from an upper surface towards a lower surface of the topsheet 2 and has in the proximity of the lower surface, a density further higher than in the second fibrous layer 12. The topsheet thus formed improves so that an upper surface thereof can be maintained in a dry state during use of the article having …
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, 1999 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2021.
- 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.