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:
Nov. 07, 1978
Filed:
May. 25, 1977
Applicant:
Inventors:
Joseph V Otrhalek, Dearborn, MI (US);
Raymond M Ajluni, West Bloomfield Township, Oakland County, MI (US);
Gilbert S Gomes, Southgate, MI (US);
Assignee:
BASF Wyandotte Corporation, Wyandotte, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
148 / ; 148 / ;
Abstract
Phosphated ferrous metal surfaces are treated with a rinse containing citric acid and sodium nitrite to enhance corrosion protection. This rinse has the advantages of providing an effluent which is not objectionable from an environmental viewpoint and does not stain the treated surfaces.