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:
Jul. 11, 2000
Filed:
Oct. 29, 1997
Applicant:
Inventors:
Kazumasa Kimura, Nara, JP;
Kinya Nagasuna, Hyogo, JP;
Takashi Namba, Osaka, JP;
Kenji Kadonaga, Hyogo, JP;
Koji Miyake, Osaka, JP;
Tadao Shimomura, Osaka, JP;
Assignee:
Nippon Shokubai Kagaku Kogyo Co. Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428402 ; 526240 ; 526306 ; 5263076 ; 5263171 ; 5263182 ; 5263185 ; 526930 ;
Abstract
A process for producing water-absorbent resins having an average particle diameter of 100 to 600 .mu.m and a particle diameter distribution of 0.35 or less by polymerizing an aqueous solution of a water-soluble ethylenically unsaturated monomer, pulverizing and sieving the polymer so obtained, and crosslinking the surface of the polymer powder.