Disposable diapers
CA 2064950 C · Owner: Uni-Charm Corporation · Inventors: Igaue, Takamitsu; Tanji, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A second topsheet 14 formed with an opening 16 is bonded along its outer periphery to a topsheet 11 of a disposable diaper and there are provided a pair of flaps 17 having inner side edges wrapping therein elastic members 19 respectively, and outer side portions thereof bonded to underside of the second topsheet 14 at both sides of the opening 16 so that the pair of flaps 17 define a second opening 18 serving to receive excretion.
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 April 2, 1992 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2014.
- 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.