Disposable diapers
CA 2091793 C · Owner: Wada, Ichiro · Inventors: Ono, Yoshio; Tanji, Hiroyuki; Soga, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable diaper so improved that the uppermost sheet 14 is formed at its central zone with an opening 16 first and second elastic members 17, 18 are attached to the sheet 14 along halves of the opening's periphery respectively, with the longitudinally opposite ends of these elastic members intersecting each other at the longitudinally opposite ends of the opening 16, respectively and the, uppermost sheet 14 is torn off from these intersections.
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 17, 1993 and granted September 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2015.
- 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.