Sanitary napkin
CA 2277351 C · Owner: Kashiwagi, Masahiro · Inventors: Kashiwagi, Masahiro; Jibiki, Keiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sanitary napkin 1 has an absorbent core 4 convexly curved upward and the absorbent core 4 is provided on its lower side with a pad 12 adapted to hold a curved shape of the absorbent core 4. The pad 12 is formed on its upper side with a plurality of projections 21 and a continuous trough 22 so that the projections 21 are bonded to the lower side of the absorbent core 4 and the trough forms a continuous tunnel 26 between the absorbent core 4 and the pad 12. The pad 12 thus formed improves a breathability of the sanitary napkin during its use.
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 July 14, 1999 and granted June 10, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 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.