Topsheet for use in body fluids absorptive goods
CA 2115206 C · Owner: Uni-Charm Corporation · Inventors: Kido, Tsutomu; Takai, Hisashi; Igaue, Takamitsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To prevent body fluids from flowing backward through a liquid-permeable topsheet 2 for use in body fluids absorptive goods 1, the topsheet 2 is formed by a nonwoven fabric made of thermoplastic synthetic fibers appropriately fused together and the sheet 2 is provided with openings 16 and a skin-contacting region 17 continuously extending around the openings 16. A first zone 11 of the topsheet 2 has a water-resistance at least in the skin-contacting region which is higher than a water-resistance in a second zone 12 13, extending outside the first zone 11 so as to suppress a back flow of body fluids possibly occurring in the skin-contacting region 17.
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 February 8, 1994 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2016.
- 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.