Absorbent article
CA 1285129 C · Owner: Ito, Osamu · Inventors: Ito, Osamu; Mizutani, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an absorbent article which comprises a liquid-impermeable, leakproof sheet, a liquidpermeable surface sheet and an absorbent layer the, leakproof sheet is a porous film, monoaxially or biaxially stretched, of a polyolefin resin composition comprising a polyolefin and a filler, having a thickness of not larger than 60 microns, an average pore size of 0.05 to 5 microns, a pore volume of not smaller than 0.1 cm3 per 1 cm3 of the film a water, vapor permeability of not smaller than 500 g/m2 for 24 hours and a bending resistance at either longitudinal or transversal directions to meet the following definition:, a bending resistance (mm) = 0.193 x a film thickness (micron) + 35.
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
- Granted June 25, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2008.
- 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.