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:
Oct. 28, 2003
Filed:
Jul. 26, 2002
Applicant:
Inventor:
Mervet S. Boulos, Troy, MI (US);
Assignee:
Henkel Kommanditgesellschaft auf Aktien, Duesseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C 2/205 ;
U.S. Cl.
CPC ...
C23C 2/205 ;
Abstract
By including nitric acid and hydroxylamine in a manganese phosphating composition and controlling the ratio of nitric to phosphoric acids and the ratio of Total Acid to Free Acid within a specified range, satisfactory manganese phosphate conversion coatings can be obtained within a reasonable time at temperatures much lower than has previously been thought necessary for operating a manganese phosphating composition with no other metal cations (except possibly for iron).