The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2008
Filed:
Feb. 09, 2004
Yoshifumi Adachi, Himeji, JP;
Takahiro Kitano, Himeji, JP;
Hirotama Fujimaru, Kishiwada, JP;
Hiroyuki Ikeuchi, Himeji, JP;
Katsuyuki Wada, Himeji, JP;
Yoshifumi Adachi, Himeji, JP;
Takahiro Kitano, Himeji, JP;
Hirotama Fujimaru, Kishiwada, JP;
Hiroyuki Ikeuchi, Himeji, JP;
Katsuyuki Wada, Himeji, JP;
Nippon Shokubi Co., Ltd., Osaka, JP;
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).