Expired Canadian patentCanada
Disposable diapers
CA 2104147 C · Owner: Uni-Charm Corporation · Inventors: Mukai, Hirotomo; Fujioka, Yoshihisa
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable diaper comprising front and rear bodies separately formed and welded together along only respective lower ends of a crotch zone, and a breathability of said front body being different from that of said rear body.
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 August 16, 1993 and granted September 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 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.
FiledAugust 16, 1993
GrantedSeptember 16, 1997
Term endedAugust 16, 2013
Patent numberCA 2104147 C
Classification (IPC)A61F13/15
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.