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. 10, 1993
Filed:
Mar. 04, 1992
Applicant:
Inventor:
John L Cordani, Waterbury, CT (US);
Assignee:
MacDermid, Incorporated, Waterbury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23G / ;
U.S. Cl.
CPC ...
156656 ; 156664 ; 252 792 ; 134-3 ; 134 41 ;
Abstract
A composition for stripping tin, and any underlying copper-tin intermetallic, from a copper surface, the composition being an aqueous solution of sulfuric acid and at least one member selected from an inorganic nitrate, preferably ferric nitrate, and nitric acid, and mixtures thereof.