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:
Jan. 28, 2020
Filed:
Aug. 10, 2015
Applicant:
Wacker Chemie Ag, Munich, DE;
Inventors:
Friedrich Popp, Ooltewah, TN (US);
Harald Hertlein, Burghausen, DE;
Assignee:
WACKER CHEMIE AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/035 (2006.01); C23C 16/01 (2006.01); C23C 16/02 (2006.01); C23C 16/24 (2006.01);
U.S. Cl.
CPC ...
C01B 33/035 (2013.01); C23C 16/01 (2013.01); C23C 16/0227 (2013.01); C23C 16/24 (2013.01);
Abstract
The rate of rod fallover in the production of polycrystalline silicon by the Siemens process is sharply reduced by cleaning the Siemens reactor base plate by at least a two-step procedure comprising suctioning the base plate in one step, and subsequently cleaning with liquid or solid cleaning medium in a second step, between each phase of rod removal and new support body installation.