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:
Nov. 02, 1999
Filed:
Sep. 15, 1997
Applicant:
Inventor:
Kwee C Wong, Londonderry, NH (US);
Assignee:
The Dexter Corporation, Industry, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
106 1444 ; 106 1411 ; 106 1415 ; 10628723 ; 10628724 ; 10628725 ; 10628726 ;
Abstract
A composition that enhances the acid resistance of copper oxide. The composition includes a solution of an alkali metal borohydride and a quaternary ammonium ion in amounts selected such that when the composition is applied to copper oxide, the composition enhances the acid resistance of the copper oxide. The preferred alkali metal borohydride is sodium borohydride or potassium borohydride, and the preferred quaternary ammonium ion has the formula ##STR1## wherein each R1, R2, R3, R4 independently comprises a lower alkyl, hydroxylalkyl or carboxyalkyl group.