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:
Sep. 28, 1993
Filed:
Jun. 05, 1992
Applicant:
Inventors:
Shigeyuki Meguro, Yokohama, JP;
Kiyotada Yasuhara, Yokohama, JP;
Assignee:
Nippon Paint Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B / ;
U.S. Cl.
CPC ...
204130 ;
Abstract
A cleaning agent is used to wash surfaces of aluminum products in a cleaning bath. The cleaning agent is a water-soluble acid containing ferric ions. During the cleaning process, the ferric ions are reduced to ferrous ions. The used cleaning agent is sent to an electrolytic tank so that the ferrous ions are subject to the electrolytic oxidation to be converted into ferric ions. The regenerated cleaning agent is returned to the cleaning bath.