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:
Oct. 14, 2003
Filed:
Aug. 21, 2001
Applicant:
Inventors:
Roger F. Clark, Newark, DE (US);
Michael G. Mauk, Newark, DE (US);
Robert B. Hall, Marana, AZ (US);
Allen M. Barnett, Landenberg, PA (US);
Assignee:
Astropower, Inc., Newark, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 3/302 ;
U.S. Cl.
CPC ...
C01B 3/302 ;
Abstract
A method of purifying silicon, comprising feeding a sparging gas into a liquid melt [ ] containing molten silicon and at least one impurity, in which the sparging gas is used to react with or move one or more impurity contained within the silicon. The products of such reaction or movement may be removed, e.g., by liquid-gas extraction, by liquid-liquid extraction or by liquid-solid extraction.