Trisection sanitary napkin
CA 2183238 C · Owner: The Procter & Gamble Company · Inventors: Amos, Charles William, Jr.; Emenaker, Ralph Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sanitary napkin hav-, ing an absorbent core with three longitudinally oriented, trisections a central trisection, flanked by two outboard trisections. The absorbent core, is formed of a single layer of tissue. The single layer of, tissue is folded on itself to provide a two-ply thickness at, each of the outboard trisections and a single thickness at, the central trisection. The two plies of the outboard trisec-, tions are preferably adhered together. Absorbent gelling, materials are disposed in each of the outboard trisections. The central trisection is substantially free of absorbent gelling materials. The sanitary napkin also preferably comprises a secondary topsheet intermediate the …
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 October 21, 1994 and granted February 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 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.