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:
Apr. 20, 1976
Filed:
Sep. 30, 1974
Applicant:
Inventors:
Iwao Ohshima, Yokohama, JA;
Seiichi Chiba, Yokohama, JA;
Kenzo Ariyama, Yokohama, JA;
Yasuo Ogawa, Kawasaki, JA;
Zengiro Kawamura, Yokohama, JA;
Assignee:
Nitto Chemical Industry Co., Ltd., Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526 83 ; 526217 ; 526218 ; 526303 ;
Abstract
A process for producing a substantially nonionic water-soluble acrylamide polymer produced without the occurence of hydrolysis of the acrylamide polymer by heating when the reaction system undergoes an unavoidable heat aging such as due to heat of polymerization comprising polymerizing a comparatively high concentration aqueous solution of acrylamide in the presence of a specific water-soluble nitrogen compound.