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:
Dec. 29, 2020
Filed:
Aug. 07, 2014
Applicant:
Wacker Chemie Ag, Munich, DE;
Inventors:
Reiner Pech, Neuoetting, DE;
Peter Gruebl, Eichendorf, DE;
Assignee:
WACKER CHEMIE AG, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B02C 17/20 (2006.01); C01B 33/021 (2006.01); B02C 1/10 (2006.01); B02C 13/28 (2006.01); C30B 29/06 (2006.01); C01B 33/02 (2006.01); C30B 15/00 (2006.01); C30B 35/00 (2006.01); B02C 4/30 (2006.01); B02C 2/00 (2006.01);
U.S. Cl.
CPC ...
C30B 35/007 (2013.01); B02C 1/10 (2013.01); B02C 2/005 (2013.01); B02C 4/305 (2013.01); B02C 13/28 (2013.01); B02C 17/20 (2013.01); C01B 33/02 (2013.01); C01B 33/021 (2013.01); C30B 29/06 (2013.01); B02C 2210/02 (2013.01); C30B 15/00 (2013.01);
Abstract
Comminuted polysilicon with reduced contamination is prepared using multi-step comminution employing comminution with comminution tools of differing tungsten carbide content and/or grain size.