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. 13, 1992
Filed:
Feb. 14, 1992
Applicant:
Inventors:
Hiroshi Itoh, Yokohama, JP;
Takashi Abe, Kamakura, JP;
Kouji Ohkoshi, Zushi, JP;
Atsuhiko Nitta, Yokohama, JP;
Assignee:
Mitsui Toatsu Chemicals, Incorporated, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
526226 ; 526126 ; 526233 ; 526234 ; 526236 ; 526237 ; 526258 ; 526265 ; 5263031 ; 5263072 ; 526310 ; 526312 ; 528422 ; 528423 ;
Abstract
By dispersing and polymerizing at least one N-alkyl-or N-alkylene-substituted (meth)acrylamide or a mixture of at least one N-alkyl- or N-alkylene-substituted (meth)acrylamide and other copolymerizable monomer is an aqueous inorganic salt solution having inorganic particulates suspended, there is provided a preparation process of granular polymers containing no impurities such as polymer stabilizers, surface active agents, etc. The granular polymers are useful as concentrating agents, slow releasing base materials, etc.