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:
Feb. 09, 1988
Filed:
Sep. 24, 1986
Applicant:
Inventors:
Takao Tsuneki, Ebina, JP;
Shinji Ano, Yokohama, JP;
Takahiko Uchida, Yamato, JP;
Tomoyasu Imai, Kawasaki, JP;
Assignee:
Kurita Water Industries Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
422 17 ; 252388 ; 2523893 ; 252396 ;
Abstract
Metal materials in contact with aqueous systems are prevented from corrosion by a method which comprises adding a copolymer having a molecular weight in the range of 1,000 to 20,000 and formed between isobutylene and at least one member selected from among maleic acid, water-soluble salts thereof, and maleic anhydride to water of such quality that the Langelier index thereof is not less than 1.5 and the relation,