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. 13, 2001
Filed:
Oct. 25, 1999
Ping-Chung Chung, Hsinchu, TW;
Tsung-Lin Lu, Tainan, TW;
Hunter Chung, Hsinchu, TW;
Chin-Hsien Chen, Taitung, TW;
Weng-Yi Chen, Jubei, TW;
Jack Yao, Pingtung, TW;
Chienfeng Chen, Kaohsiung, TW;
Other;
Abstract
A method for removing extraneous matters from a stainless device is provided. The method includes the steps of (a) providing a container for holding a fluorine-containing neutral solution therein, (b) immersing said stainless device in said fluorine-containing neutral solution to remove said extraneous matters from said stainless device, and (c) heating and swirling said fluorine-containing solution. The fluorine-containing neutral solution is made from neutralizing hydrofluoric acid (HF) with ammonium hydroxide (NH,OH), neutralizing hydrofluoric acid (HF) with ammonium fluoride (NH,F), or dissolving ammonium acid fluoride (NH,F) in a deionized water (DIW).