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:
Mar. 12, 1985
Filed:
Mar. 19, 1982
Applicant:
Inventor:
Yukimori Moji, Seattle, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
148-62 ; 148 / ; 148-627 ;
Abstract
The corrosion resistance and coating adhesion characteristics of an aluminum oxide film produced by anodization is improved by contacting the film with a dilute aqueous solution of an oxidizing composition, for example chromic acid, and a pH altering substance that maintains the pH of the solution between 3.0 and 5.0. Exemplary pH altering compositions are respectively chromic acid and sodium or magnesium chromate.