Disposable diaper
CA 2246820 C · Owner: Otsubo, Toshifumi · Inventors: Sayama, Yasushi; Inoue, Yasushi; Otsubo, Toshifumi
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 cover member having an hourglass-shape and a separate liquid-absorbent member composed of a liquid-permeable topsheet, a liquid-impermeable backsheet and a liquid-absorbent core. The cover member is elastically stretchable along the upper end of front or rear waist region and these front and rear waist regions are connected or connectable along transversely opposite side edges thereof. The liquid-absorbent member includes first and second elastically stretchable members circumferentially extending across portions of the front and rear trunk regions lying immediately above the crotch region. Longitudinally opposite ends of these elastically stretchable members …
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 September 8, 1998 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2020.
- 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.