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:
Dec. 15, 1987
Filed:
Aug. 01, 1986
Applicant:
Inventor:
Harold Schiller, Long Beach, CA (US);
Assignee:
Ardrox Inc., La Mirada, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ; B44C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
156656 ; 134-3 ; 134 41 ; 156640 ; 156664 ; 156666 ; 156902 ; 252 792 ; 252 794 ;
Abstract
A composition and method for stripping solder and the underlying tin-copper alloy from the copper substrate of a printed circuit board with a single application of the composition. An aqueous solution of nitric acid, ferric nitrate and sulfamic acid, which may be sprayed directly onto the printed circuit board for removing both the solder and the alloy.