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:
Nov. 06, 2007
Filed:
Aug. 31, 2004
John D. Holder, Lake St. Louis, MO (US);
Hariprasad Sreedharamurthy, Ballwin, MO (US);
John D. Hilker, St. Charles, MO (US);
John D. Holder, Lake St. Louis, MO (US);
Hariprasad Sreedharamurthy, Ballwin, MO (US);
John D. Hilker, St. Charles, MO (US);
MEMC Electronic Materials, Inc., St. Peters, MO (US);
Abstract
The invention is directed to apparatus and methods for measuring and for reducing dust in granular polysilicon. In one aspect, a system includes a process vessel having a vacuum port for pulling dust from the polysilicon. Another system of the invention includes a baffle tube for receiving a polysilicon flow. A measuring system includes a manifold and filter for separating and measuring the dust from a flow of polysilicon. The invention is also directed to methods of using the systems, to methods of manufacturing and packaging granular polysilicon, and to a supply of granular polysilicon.