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:
Apr. 03, 2018
Filed:
Nov. 10, 2014
Samsung Electronics Co., Ltd., Gyeonggi-do, KR;
Yong-Jhin Cho, Gyeonggi-do, KR;
Jung-Min Oh, Incheon, KR;
Yongmyung Jun, Gyeonggi-do, KR;
Yongsun Ko, Gyeonggi-do, KR;
Kuntack Lee, Gyeonggi-do, KR;
Hyosan Lee, Gyeonggi-do, KR;
SAMSUNG ELECTRONICS CO., LTD., Suwon-si, Gyeonggi-Do, KR;
Abstract
A method of purifying a cleaning agent is provided. The method includes heating a first mixed solution including an etching agent, a first cleaning agent, and a second cleaning agent at or below a first temperature and distilling the etching agent and the first cleaning agent and removing the second cleaning agent. The method includes condensing or compressing the etching agent and the first cleaning agent forming a second mixed solution including the etching agent and the first cleaning agent. The method includes heating the second mixed solution at a temperature lower than a second temperature, redistilling the etching agent and extracting the first cleaning agent. The second temperature is lower than the first temperature.