Sanitary napkin
CA 2071961 C · Owner: Murakami, Masaki · Inventors: Murakami, Masaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sanitary napkin 10 is provided with flaps 15 including wings 14 formed on laterally opposite sides thereof. Top surfaces of the flaps 15 are formed by liquid barrier sheets 17 of which the inner areas 17a form together with a, topsheet 11, pockets 19 therebetween to receive menstrual fluid. The pockets 19 are opened as the wings 14 are folded onto the outer sides of a crotch zone of user's underpants to fix the napkin 10 thereto.
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 January 13, 1992 and granted November 11, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 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.