Sanitary napkin
CA 2272010 C · Owner: Uni-Charm Corporation · Inventors: Muzutani, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sanitary napkin 1 comprising a first member 2 including a liquid-pervious topsheet 3 a liquid-impervious backsheet 4 and a first liquid-absorbent core 5 disposed therebetween and a second member 10 including a substantially liquid-pervious and elastically stretchable/contractile sheets 11 12 and a second liquid-absorbent core 13 covered with the elastically stretchable/contractile sheets 11 12, wherein the first and second members 2 10 respectively have a longitudinal direction defining their opposite side end portions 6 7, 15, 16 and a transverse direction defining their opposite side edge portions 8 9, 17, 18, the second member 10 being placed upon and joined under tension in the …
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 May 12, 1999 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2021.
- 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.