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:
Apr. 14, 1998
Filed:
Apr. 16, 1996
Applicant:
Inventors:
Peter Heymanns, Essen, DE;
Waldemar Kascha, Oberhausen, DE;
Ernst Prott, Oberhausen, DE;
Horst Scholz, Wesel, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B08B / ; C03C / ; C23D / ;
U.S. Cl.
CPC ...
134-2 ; 134 29 ; 134 38 ; 134 39 ; 134 40 ; 134 42 ;
Abstract
A process for removing contaminating coatings from metal surfaces in which the metal surface to be cleaned is brought into contact with an aqueous alkaline solution containing as an additive 0.1 to 10% by weight, based on the aqueous alkaline solution, of at least one compound of the formula