Absorbents containing stiffened fibers and superabsorbent materials
CA 2069443 C · Owner: Lash, Glen R. · Inventors: Young, Gerald A.; Lash, Glen R.; Cook, Jeffery T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Absorbent structures having a fluid acquisition/distribution layer (110) with an average dry density of less than about 0.30 g/cc. an average density upon wetting with 1.0 % NaC1 aqueous solution of less than about 0.20 g/cc and an average dry basis, weight from about 0.001 to about 0.10 g/cm2; and a fluid storage layer (108) positioned beneath the acquisition/distribution layer (110) comprising at least about 15 % superabsorbent material. The fluid acquisition/distribution layer (110) comprises from about 50 % to 100 % chemically stiffened cellulosic fibers and from 0 % to about 50 % binding means.
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 January 14, 1991 and granted March 31, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2013.
- 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.