Cooling article involving evaporation of water from a...

Stock material or miscellaneous articles – Hollow or container type article – Glass – ceramic – or sintered – fused – fired – or calcined metal...

Reexamination Certificate

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C428S343000, C428S071000, C428S402000, C428S407000, C128S101100, C128S112100, C126S204000, C165S046000, C602S045000, C602S046000, C602S056000, C602S058000, C602S076000, C607S096000, C607S108000, C607S109000, C607S110000, C607S111000, C607S112000, C607S113000, C607S114000, C604S385190, C604S366000, C604S369000, C604S358000, C604S370000, C604S290000, C604S543000, C604S317000

Reexamination Certificate

active

07048976

ABSTRACT:
The invention relates to a cooling article comprising a polymer absorbent enclosed within a bag delimited by a collapsible envelope having non-watertight walls, wherein said polymer absorbent is under the form of particles each of which comprises a core of less cross-linked polymer sequences more active in retaining absorbed water and a shell of more cross-linked polymer sequences apt to retard diffusion of water from a particle to another during desorption of absorbed water.

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patent: WO 02063984 (2002-08-01), None

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