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:
Dec. 11, 1984
Filed:
Apr. 11, 1983
Applicant:
Inventors:
Tomihiro Hara, Yokohama, JP;
Hiroshi Kagechika, Kawasaki, JP;
Satoshi Doi, Yokohama, JP;
Yoshinori Yomura, Kawasaki, JP;
Assignee:
Nippon Kokan Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ;
U.S. Cl.
CPC ...
204 27 ; 204373 ; 204 40 ; 204 / ;
Abstract
A steel sheet utilized to prepare cans comprises an iron base sheet, a Fe--Sn alloy layer formed on the iron base sheet and containing 0.05-0.7 g/m.sup.2 of tin and 40-80 atomic % of iron, and a composite oxide film formed on the alloy layer and containing Fe, Sn, Cr and O. The composite oxide film is formed by applying a cathodic dichromate treatment to the steel sheet which has been quenched and cooled to form an oxide film on the alloy layer, the oxide film containing both of tin and iron oxides being converted to the composite oxide film.