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:
Feb. 19, 2013
Filed:
Apr. 20, 2007
Applicants:
Masayoshi Handa, Himeji, JP;
Yasuhiro Nawata, Kako-gun, JP;
Inventors:
Masayoshi Handa, Himeji, JP;
Yasuhiro Nawata, Kako-gun, JP;
Assignee:
Sumitomo Seika Chemicals Co., Ltd., Kako-gun, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 20/26 (2006.01); C08F 2/18 (2006.01); C08F 20/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method of producing water-absorbent resin particles in which a median particle size of primary particles (d) and a median particle size of secondary particles (D) satisfy the relationship of the formula, 5d/3+150<D<5d+150, comprising the steps of: