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. 07, 1998
Filed:
Feb. 10, 1997
Applicant:
Inventor:
Yuichi Ono, Tokyo, JP;
Assignee:
Kurita Water Industries Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ; B08B / ; C02F / ;
U.S. Cl.
CPC ...
422 14 ; 134 2211 ; 427239 ; 210759 ; 210764 ; 210765 ;
Abstract
Hydrogen peroxide or a hydrogen peroxide producing agent is added to a water system having copper or copper alloy such as a thermal storage water system or a closed water system whereby the concentration of hydrogen peroxide in the circulating water becomes 1 to 200 mgH.sub.2 O.sub.2 /L. Hydrogen peroxide produces oxygen and oxygen works microbes directly so as to remove the microbial fouling and thus prevent the pitting corrosion in copper or its alloy due to microbial contamination.