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. 05, 1985
Filed:
Feb. 18, 1983
Applicant:
Inventor:
Karl A Schulke, Neuberg, DE;
Assignee:
Heraeus-Quarzschmelze, Hanau am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
118733 ; 118715 ; 118724 ; 432251 ;
Abstract
A bell made of opaque fused silica and intended for use in the deposition of polycrystalline silicon is assembled from at least three individual sections. The sections are joined to one another at end flanges with gaskets between the flanges. The lengths of the individual sections are determined by the temperature distribution along the bell in use.