Disposable diaper
CA 2017609 C · Owner: Uni-Charm Corporation · Inventors: Kudo, Takeshi; Nozaki, Satoshi; Ohnishi, Kazuaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable diaper includes a liquid-permeable top sheet, a liquid-barrier back sheet, and a liquid-absorptive core sandwiched between these two sheets. Side flaps extend from the two side edges of the core, and have elastic parts which are longitudinally stretchable. Side wings protrude from the two sides of the front and rear waist portions. Each side wing comprises a composite of a sweat-absorptive air-permeable layer, and a liquid-barrier air-permeable layer.
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 May 28, 1990 and granted February 17, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2012.
- 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.