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:
Aug. 15, 1989
Filed:
Jan. 11, 1988
Applicant:
Inventors:
Haruyoshi Terada, Tokyo, JP;
Youji Ono, Tokyo, JP;
Yokichi Satoh, Tokyo, JP;
Hideaki Kaneko, Tokyo, JP;
Assignee:
Nihon Parkerizing Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C11D / ; D06L / ;
U.S. Cl.
CPC ...
252100 ; 252 793 ; 252 794 ; 252 95 ; 252142 ; 252148 ; 134-3 ; 134 40 ; 134 41 ;
Abstract
The present invention offers a cleaning agent for aluminium surface which is an aqueous acidic liquid containing peroxo acid and/or peroxide in 0.05-10 g/l and further one or more kinds out of sulphuric acid, phosphoric acid and nitric acid.