Thermal bonding of blends of cellulosic and polyethylene pulp
CA 2126000 A1 · Owner: Robson, Russell · Inventors: Robson, Russell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An absorbent structure comprising a low density cellulosic core formed from a blend of 70-97% by weight of cellulosic fibres and 3-30% by weight of polyethylene pulp, based on the total weight of the cellulosic fibres and polyethylene pulp, is disclosed. The polyethylene pulp is formed from polyethylene having a density in the range of 0.930-0.965 g/cm3 and a melt index of less than 8 dg/min. The polyethylene pulp has monocomponent fibres and the core has a matrix of bonded polyethylene pulp. The blend may contain super absorbent polymer. Absorbent structures of improved properties are obtained e.g. for use in diapers and other absorbent structures. - 20 -
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 June 16, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 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.