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:
Feb. 26, 2013
Filed:
Dec. 04, 2008
Applicant:
Patrik Hoffmann, Epalinges, CH;
Inventor:
Patrik Hoffmann, Epalinges, CH;
Assignee:
Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03D 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for separating and recovering silicon debris from sawing waste is characterized in that it includes the following steps: —treating the sawing waste so as to deoxidize the silicon debris in a manner that reduces their surface energy, —applying to the sawing waste thus treated a flotation method using a flotation liquid and a nonoxidizing flotation gas, and —recovering the silicon debris at the surface of the flotation liquid.