Method for forming a skin-contacting topsheet of a disposable diaper with an elastic opening
CA 2093552 C · Owner: Soga, Hiroyuki · Inventors: Ono, Yoshio; Wada, Ichiro; Tanji, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for forming a skin-contacting topsheet of disposable diaper with an elastic opening wherein the opening 16 formed in a skin-contacting topsheet 14 of a disposable diaper is elasticized along its whole peripheral edge and reinforced so as to form uniform gathers along the whole peripheral edge. The skin-contacting topsheet 14 comprises a pair of sheet members 14a, 14b overlapping side-by-side and having mutually opposed inner side edges respectively, which are provided with cutouts so that each pair of mutually opposed cutouts form each opening 16, then elastic members 17 are provided along halves of the opening's whole peripheral edge and these elastic members are covered with a …
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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 April 6, 1993 and granted September 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 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.