logo

For the Inventor, By the Inventor

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.:

US 9518327 B1

PDFFull Text
Date of Patent:
Dec. 13, 2016

Filed:

Dec. 17, 2015

Metal stripping additive, composition containing the same, and method for stripping metal by using the composition

Applicant:

Uwin Nanotech. Co., Ltd., New Taipei, TW;

Inventor:

Ching-Hsiang Hsu, New Taipei, TW;

Assignee:

UWIN NANOTECH, CO., LTD., New Taipei, TW;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Gregory R Delcotto

Int. Cl.
CPC ...
B08B 3/04 (2006.01); C11D 7/08 (2006.01); C11D 7/12 (2006.01); C11D 7/16 (2006.01); C23F 1/18 (2006.01); C23F 1/16 (2006.01); C23F 1/30 (2006.01); H05K 3/22 (2006.01); C22B 3/00 (2006.01); C22B 15/00 (2006.01); C22B 25/06 (2006.01); C23F 1/28 (2006.01);
U.S. Cl.
CPC ...
C23F 1/18 (2013.01); C22B 11/046 (2013.01); C22B 15/0063 (2013.01); C22B 23/04 (2013.01); C22B 25/04 (2013.01); C22B 25/06 (2013.01); C23F 1/16 (2013.01); C23F 1/30 (2013.01); H05K 3/22 (2013.01); B08B 3/04 (2013.01); B08B 3/044 (2013.01); C23F 1/28 (2013.01); H05K 2203/0789 (2013.01); H05K 2203/178 (2013.01);
Abstract

The present invention provides a metal stripping additive, composition containing the same, and method for stripping metal by using the composition. The metal stripping additive comprises a phosphate, a carbonate, and a component selected from at least one of citric acid or a derivative thereof, oxalate or a derivative thereof, malate or a derivative thereof. The metal stripping additive is used with nitric acid as the metal stripping composition of the present invention. The present method has advantages of being capable of stripping various metals, low corrosion, low toxicity, and being applicable under ambient temperature.

Find Patent Forward Citations

Loading…