Disposable diaper having skin-contacting topsheet provided with elastic opening and method for making the elastic opening
CA 2094415 C · Owner: Ono, Yoshio · Inventors: Tanji, Hiroyuki; Wada, Ichiro; Soga, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of forming a skin-contacting topsheet of a disposable diaper with an elastic opening is described. The, method comprises feeding first and second continuous elastic members in a specific orientation to form crests and troughs which are offset from one another. These elastic members are glued onto the first continuous web and form therewith a composite web. A second continuous web is bonded on the first web and forms a second continuous composite web. Part of the second continuous composite web is cut away in a specific manner so as to form cut-outs destined to define openings and thereby form third and fourth continuous composite web members. These third and fourth web members are …
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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 20, 1993 and granted July 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 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.