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. 31, 2012
Filed:
Jan. 15, 2010
Applicants:
Takuma Yoshioka, Akita, JP;
Masaki Morikawa, Akita, JP;
Inventors:
Takuma Yoshioka, Akita, JP;
Masaki Morikawa, Akita, JP;
Assignee:
Japan Super Quartz Corporation, Akita-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C30B 13/06 (2006.01); B29C 39/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a mold for use in the production of a silica crucible, a mold cover corresponding to a small-diameter thinned portion of an upper part of the silica crucible is detachably disposed on a mold substrate corresponding to a main body of the silica crucible, and the mold cover has a barrier function against arc heating, and an inner diameter of the mold cover is smaller than that of the mold substrate but larger than that of the silica crucible.