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:
Oct. 15, 1996
Filed:
Aug. 11, 1995
Applicant:
Inventors:
John H Wagenknecht, Cedar Hill, MO (US);
Gary V Johnson, St. Charles, MO (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B08B / ; C23G / ; C23G / ; C23G / ;
U.S. Cl.
CPC ...
134-2 ; 134-3 ; 134 41 ; 134 28 ; 134 2214 ; 134 2219 ; 252 791 ;
Abstract
A method for selectively dissolving a soft metal from a substrate of a harder metal by application thereto of an organic nitrocompound and a carboxylic acid. The organic nitrocompound, upon exposure to the soft metal, oxidizes the soft metal to form a first soft metal salt. The carboxylic acid, upon exposure to the soft metal salt, reacts with the first soft metal salt to form a second soft metal salt that is soluble in the composition.