Sanitary articles with multi aperture size film topsheets
CA 2230833 C · Owner: Schone, Rainer Walter Max · Inventors: Schone, Rainer Walter Max
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to absorbent articles particularly sanitary napkins having film topsheets. In particular a film topsheet receiving the liquids to be absorbed comprises apertures of at least 4 different sizes. This range of aperture sizes provides exceptionally good liquid intake performance for the range of liquid viscosities commonly found for liquids which are absorbed in sanitary napkins.
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 30, 1996 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2018.
- 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.