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:
Sep. 30, 1980
Filed:
Jun. 04, 1979
Applicant:
Inventors:
John L Allan, Glen Rock, NJ (US);
Philip D Readio, Sparta, NJ (US);
Ajay M Bengali, Hackensack, NJ (US);
Richard F Zuendt, Oradell, NJ (US);
Assignee:
Dart Industries Inc., Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ; C23F / ;
U.S. Cl.
CPC ...
106 1412 ; 106 1421 ; 106 1445 ; 148-617 ; 148-624 ; 148-627 ; 148 315 ; 252 794 ; 252387 ; 2523 / ; 428470 ;
Abstract
Improved color, brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treatment with a non-toxic solution comprised of sulfuric acid, hydrogen peroxide, a silicate and at least one cationic triarylmethane dye. Certain organophosphorus compound additives further enhance the corrosion resistance.