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. 16, 2018
Filed:
Mar. 24, 2008
Kazumasa Konishi, Himeji, JP;
Kenji Kadonaga, Kakogawa, JP;
Yorimichi Dairoku, Setouchi, JP;
Shinichi Fujino, Himeji, JP;
Kazumasa Konishi, Himeji, JP;
Kenji Kadonaga, Kakogawa, JP;
Yorimichi Dairoku, Setouchi, JP;
Shinichi Fujino, Himeji, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
A particulate water absorbent resin is obtained by polymerizing an unsaturated monomer so as to form a cross-linked polymer hydrogel and drying and pulverizing the cross-linked polymer hydrogel, and plural classification steps different from each other are carried out so as to remove fine powder. In this manner, the present invention provides the method for classification of particulate water absorbent resin which method allows particulate water absorbent resin having a desired particle diameter range to be efficiently obtained at low cost while securing the high productivity even in case where a larger production equipment is used.