Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Reexamination Certificate
2004-02-09
2008-10-14
Lipman, Bernard (Department: 1796)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
C428S500000, C428S507000, C525S326700, C525S328500, C525S328800, C525S328900, C525S329400, C525S329600, C525S329900, C525S330100, C525S380000, C525S382000, C525S384000
Reexamination Certificate
active
07435477
ABSTRACT:
A particulate water absorbent contains a water absorbent resin as a main component, the water absorbent resin being a crosslinked polymer of a water-soluble unsaturated monomer. The water absorbent resin is particular in shape and contains particles of a particle size in a range of not less than 106 μm and less than 850 μm in an amount of not less than 90 mass percent with respect to the total mass of the water absorbent resin contained in the particulate water absorbent. The particulate water absorbent has a first salt concentration absorption index of not less than 0.60 as measured by a formula below when ion exchange water is used as an aqueous solution of a constant salt concentration: (salt concentration absorption index)=(absorbency against a pressure of 4.83 kPa with respect to the aqueous solution of a constant salt concentration)/(absorbency against no pressure with respect to the aqueous solution of a constant salt concentration).
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Office Action mailed Jun. 23, 2006 by the Chinese Patent Office for corresponding Chinese Application No. 200480000104.7.
Adachi Yoshifumi
Fujimaru Hirotama
Ikeuchi Hiroyuki
Kitano Takahiro
Wada Katsuyuki
Lipman Bernard
Nippon Shokubi Co., Ltd.
Nixon & Vanderhye P.C.
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