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:
Aug. 09, 1983
Filed:
Dec. 17, 1981
Applicant:
Inventor:
Karl A Schulke, Neuberg, DE;
Assignee:
Heraeus Quarzschmelze GmbH, Hanau, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65D / ;
U.S. Cl.
CPC ...
428 35 ; 428156 ; 428428 ; 4285428 ; 422102 ; 422240 ;
Abstract
Bell of translucent fused silica having an inner layer of transparent fused silica for the precipitation of polysilicon. The thickness of the transparent fused silica layer increases continuously towards the open end of the bell while the total wall thickness of the bell is kept constant. The thickness increase of the transparent fused silica layer begins preferably beyond the center of the total length of the bell. The thickness of the transparent fused silica layer increases by at least half of the thickness which it has in the top part of the bell.