Metal working – Means to assemble or disassemble – Means to disassemble electrical device
Reexamination Certificate
2005-10-24
2008-12-09
Cozart, Jermie E (Department: 3726)
Metal working
Means to assemble or disassemble
Means to disassemble electrical device
C029S403300, C029S403400, C029S890030, C241S020000, C241S023000, C204S157150
Reexamination Certificate
active
07461449
ABSTRACT:
The present invention springs from the discovery that mild acids could be utilized to shear undesired metals away from desired precious metals that have been plated onto circuit board runners or contacts. This shearing action occurs at a high rate when metal scrap segments are immersed in mild acid and excited by application of an electromagnetic field at specific frequencies and power levels. These frequencies and power levels are based on the end metal desired and the metals contained in the scrap and the acid utilized. When mild acid saturated with copper sulfate and loaded with scrap metals is subjected to an electromagnetic field at the appropriate frequency and power levels, copper and nickel molecules are sheared rapidly and absorbed into solution, leaving only the desired metal, such as gold, in a 99.5% pure flake which can be skimmed off the surface of the solution or filtered from the solution. The captured metal flake is then rinsed in water and denatured alcohol, compressed, melted and poured into bars or nuggets for further use or sale.
REFERENCES:
patent: 3539693 (1970-11-01), Elischer
patent: 3885744 (1975-05-01), Drage
patent: 3905556 (1975-09-01), Drage
patent: 4301320 (1981-11-01), Hochstrasser et al.
patent: 5139203 (1992-08-01), Alavi
patent: 5217171 (1993-06-01), Feldman
patent: 5630554 (1997-05-01), Izumikawa
patent: 5662579 (1997-09-01), Bickford
patent: 5676318 (1997-10-01), Yokoyama
patent: 5843287 (1998-12-01), Wicks
patent: 5887805 (1999-03-01), Chapman
patent: 5979033 (1999-11-01), Chang
patent: 6143139 (2000-11-01), Wicks
Ronald Rosenson, Refining & smelting precious metals from PC Boards, Conf. paper NEPCON West—1994.
Cozart Jermie E
Lachenmaier Frank D.
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