Absorbent members containing interparticle crosslinked aggregates
CA 2078239 C · Owner: The Procter & Gamble Company · Inventors: Lahrman, Frank Henry; Berg, Charles John; Roe, Donald Carroll
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Absorbent members incorporating particulate absorbent, polymeric compositions , comprising interparticle crosslinked aggregates. The interparticle crosslinked aggregates comprise precursor particles of substantially water-insoluble absorbent, hydrogel-forming, polymer material; and an interparticle crosslinking agent reacted with the polymer material of the precursor particles to form crosslink bonds between the precursor particles. The absorbent members of the present invention can comprise a combination of fiber material and discrete particles of the polymeric composition or laminates (layered absorbent members) containing such polymeric compositions. The performance of absorbent …
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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 25, 1991 and granted March 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 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.