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:
Aug. 06, 1985
Filed:
Jun. 20, 1984
Applicant:
Inventors:
Ryuji Kojima, Tokyo, JP;
Akiko Yazaki, Tokyo, JP;
Assignee:
Parker Chemical Company, Madison Heights, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
436-2 ; 436-5 ; 436 81 ; 436 84 ; 436103 ; 436175 ;
Abstract
A method for determining the coating weight and composition of a zinc phosphate coating on a ferrous metal surface comprises stripping the coating from a known area using an aqueous solution of sodium hydroxide and triethanolamine, thereafter measuring the iron and phosphate contents by colorimetric analysis of the stripping solution and then determining the coating weight and composition based on such measurements.