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:
May. 01, 1984
Filed:
Aug. 30, 1983
Applicant:
Inventors:
Hans J Gohausen, Langenfeld, DE;
Winfried Kirchhoff, Duesseldorf, DE;
Jurgen Lindener, Monheim, DE;
Harald Wennemann, Erkrath, DE;
Assignee:
Henkel KGaA, Duesseldorf, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 / ; 148-627 ;
Abstract
A process for sealing anodically produced oxide layers on aluminum and aluminum alloys by treating them with an aqueous solution at a temperature between about 90.degree. C. and its boiling point, wherein the aqueous solution has a pH of from about 4 to about 8 and and contains from about 0.0005 to about 0.5 g/l of at least one phosphinocarboxylic acid or its water-soluble salt.