Disposable diaper
CA 2288478 C · Owner: Uni-Charm Corporation · Inventors: Nanba, Norio; Kitaoka, Hideaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable diaper including a topsheet 2 and a topsheet 2 is covered, at least in one of front and rear waist regions 20 22, with a liquid-resistant sheet 5 bonded to a longitudinal end 22a and transversely opposite side edges 22b of that one of the front and rear waist regions 20 22; an elastic foamed member 6 which is folded in two along a folding axis zone 6c extending longitudinally thereof and has a first portion 6a placed against the upper surface of the topsheet 2 and a second portion 6b placed against the lower surface of a liquid-resistant sheet 5 is disposed between the topsheet 2 and the liquid-resistant sheet 5 in such a manner that the foamed member 6 lies on an upper portion …
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 2, 1999 and granted September 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 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.