Liquid-absorbent sanitary cellulose product
CA 2213672 C · Owner: Procter & Gamble Gmbh · Inventors: Haubach, Klaus Karl Ferdinand
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid-absorbent sanitary cellulose product in, particular a diaper, sanitary napkin or the like comprises a liquid-proof back layer (2) and an absorbent body (3). A storage layer (5) is arranged between the absorbent body (3) and the back layer (2) this, storage layer (5) consisting of a layer of non-woven material (6) profiled in the direction of thickness (D) of the product by chamber-like impressions (7) being formed, into each of which are inserted super-absorbent hydrogel particles (8).
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 March 4, 1996 and granted July 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 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.