Sanitary napkin
CA 1298684 C · Owner: Kao Corporation · Inventors: Shirose, Toshihiro; Sakurai, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sanitary napkin comprises a liquid-permeable surface sheet, a liquid-impermeable leakproof sheet and an absorbent, body between the surface sheet and the leakproof sheet. The absorbent body comprises a first absorbent paper sheet a second, absorbent paper sheet and an absorbent material between the two papers. The first absorbent paper sheet covers at least a part of the second absorbent sheet, and the first absorbent paper sheet is fixed at a portion thereof covering the second absorbent paper sheet to the leakproof sheet. The absorbent body may be composed of two absorbent material layers including an upper layer having a width smaller than a lower layer.
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 April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2009.
- 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.