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:
Jul. 18, 2000
Filed:
Sep. 28, 1999
Kuo-Ching Chang, Kaohsiung, TW;
Kuo-Jer Hwang, Kaosiung Hsien, TW;
Gow-Guang Goan, Kaosiung Hsien, TW;
Wei-Hsin Li, Hsinchu, TW;
Cleanenv' Engineeering Consultant Co., Ltd., Kaohsiung Hsien, TW;
Abstract
A method for treating waste printing circuit boards with molten mixture of inorganic salts comprising actions of: (1) putting the circuit boards into the molten inorganic salts contained in a treating furnace; (2) crushing and stirring for copper foil of the circuit boards to be separated therefrom; (3) further stirring to separate the foil from the plastic and the glass fiber of the circuit boards; (4) scraping the floating residues of the plastic and the glass fiber on upper surface of the molten inorganic salts with a floating residues scraping device; (5) collecting the carbonized plastic residues and the glass fiber; (6) converting waste gas produced in the process into an unharmful and stable one; and (7) removing the copper foil by a certain amount regularly with a removing device.