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. 30, 1980
Filed:
Jul. 10, 1979
Applicant:
Inventors:
Wilbur S Hall, Plymouth Meeting, PA (US);
Harry M Leister, Ambler, PA (US);
Assignee:
Amchem Products, Inc., Ambler, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A23F / ;
U.S. Cl.
CPC ...
427327 ; 427435 ; 134-2 ;
Abstract
A metallic substrate is pretreated with a composition containing an acid corrosion inhibitor prior to subjecting the substrate to an acidic aqueous autodepositing coating composition of the type which contains dissolved fluoride and ferric ions in order to improve the quality of the coating formed from said autodepositing composition by reducing or preventing the tendency of the composition to form coatings which contain pinholes or blisters on worked or roughened areas of the metallic surface.