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:
Dec. 24, 2002
Filed:
Jan. 09, 2001
Peter Schubach, Nidderau, DE;
Joachim Heitbaum, Bad Homburg, DE;
Thomas Kolberg, Heppenheim, DE;
Margit Fleischhacker-Jeworrek, Usingen, DE;
Peter Jorns, Frankfurt am Main, DE;
Michael Deemer, Frankfurt am Main, DE;
Ralf Stickler, Kahl am Main, DE;
Jurgen Specht, Rodgau, DE;
Michael Lenhard, Bad Vilbel, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
An aqueous solution contains phosphate for producing layers of phosphate on metal surfaces selected from the group consisting of iron, steel, zinc, zinc alloys, aluminum and aluminum alloys. The solution contains 0.3 to 5 g Zn /1, 0.1 to 2 g nitroguanidine/1 and 0.05 to 0.5 g hydroxylamine/l, with an S-value amounting to 0.03 to 0.3 and the ratio of the weight of Zn to P O =1:5 to 1.30.