Absorbent structures
CA 1296875 C · Owner: The Procter & Gamble Company · Inventors: Wong, Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to absorbent structures in which hydrogel has improved ability to absorb salt-containing fluids due to inclusion within the absorbent structures of fibrous anion exchange materials. The absorbent structures of the present invention comprise hydrogel and fibrous anion exchange material (e.g. DEAE cellulose), and, optionally fibrous cation, exchange materials and/or conventional absorbent materials; said absorbent structures having an equilibrium pH of from about 5 to about 11. The present invention further relates to disposable absorbent products (e.g. diapers, incontinent pads sanitary, napkins) which comprise absorbent structures of the present invention.
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 March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 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.