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. 01, 2003
Filed:
Dec. 05, 2000
Applicant:
Inventors:
Masakazu Koizumi, Tokyo, JP;
Yukimasa Shimura, Tokyo, JP;
Shiro Taya, Tokyo, JP;
Takatoshi Sato, Tokyo, JP;
Assignee:
Kurita Water Industries Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/70 ; C23F 1/110 ;
U.S. Cl.
CPC ...
C02F 1/70 ; C23F 1/110 ;
Abstract
An oxygen scavenger, containing a heterocyclic compound having a N-substituted amino group as an effective component, can adequately exhibit the oxygen scavenging effect in not only feed water lines for high temperature water, a boiler, and steam and condensate return lines, but also feed water lines for low temperature water. The oxygen scavenger contains: a heterocyclic compound having a N-substituted amino group or a salt thereof; a hydroxybenzene derivative and/or a naphthoquinone derivative; and neutral amine.