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:
Sep. 12, 2017
Filed:
Oct. 31, 2012
Applicant:
Sumco Corporation, Minato-ku, Tokyo, JP;
Inventors:
Toshiaki Sudo, Akita, JP;
Tadahiro Sato, Akita, JP;
Ken Kitahara, Akita, JP;
Takuma Yoshioka, Akita, JP;
Hiroshi Kishi, Akita, JP;
Assignee:
SUMCO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 15/10 (2006.01); C03B 19/09 (2006.01); C30B 35/00 (2006.01); C30B 11/00 (2006.01); C30B 29/06 (2006.01);
U.S. Cl.
CPC ...
C30B 15/10 (2013.01); C03B 19/095 (2013.01); C30B 11/002 (2013.01); C30B 29/06 (2013.01); C30B 35/002 (2013.01); Y10T 117/1032 (2015.01);
Abstract
Buckling of a vitreous silica crucibleor inward fall of a sidewallis effectively suppressed. The vitreous silica crucibleincludes the cylindrical sidewallhaving an upward-opening rim, a mortar-shaped bottomincluding a curve, and a round portionconnecting the sidewalland the bottom. In the vitreous silica cruciblethe per-unit area thermal resistance in the thickness direction of the sidewallis higher than that of the round portion