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. 07, 2004
Filed:
Jun. 28, 2001
Applicant:
Inventors:
Masanori Fukui, Akita, JP;
Takahiro Sato, Akita, JP;
Assignee:
Mitsubishi Materials Quartz Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03B 1/00 ;
U.S. Cl.
CPC ...
C03B 1/00 ;
Abstract
The amount of residual carbon and hydroxyl groups in a synthetic quartz powder made by a wet process is reduced by baking the synthetic quartz powder in a low pressure atmosphere. Quartz glass crucibles made using the synthetic quartz powder have low bubble contents, and are particularly suited for growing single crystals.