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:
Mar. 08, 1983
Filed:
Mar. 18, 1981
Applicant:
Inventors:
Jiro Okamoto, Takasaki, JP;
Isao Ishigaki, Maebashi, JP;
Hironobu Fukuzaki, Takasaki, JP;
Shozo Shimbo, Kakogawa, JP;
Kiyoaki Yoshikawa, Kobe, JP;
Assignees:
Japan Atomic Energy Research Institute, Tokyo, JP;
Taki Chemical Co. Ltd., Hyogen, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
20415916 ; 2041592 ;
Abstract
A water-soluble vinyl polymer is produced by polymerizing a water-soluble vinyl monomer in the presence of a catalyst or under the action of ultraviolet rays to prepare a polymer having a degree of polymerization of at least 95%, adjusting the water content of the system containing said polymer to be within the range of from 15 to 30%, and irradiating said system with ionizing radiation.