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:
Mar. 17, 2015
Filed:
Jan. 22, 2010
Applicants:
Masaru Sato, Akita, JP;
Masaki Morikawa, Akita, JP;
Inventors:
Masaru Sato, Akita, JP;
Masaki Morikawa, Akita, JP;
Assignee:
Japan Super Quartz Corporation, Akita-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C30B 35/00 (2006.01); C30B 15/00 (2006.01); C30B 15/10 (2006.01);
U.S. Cl.
CPC ...
C30B 15/10 (2013.01); Y10S 117/90 (2013.01);
Abstract
A crucible for pulling a silicon single crystal has a double structure comprising a silica crucible and a graphite crucible covering an outside of the silica crucible, wherein the silica crucible is provided at its opening end portion with an inward falling prevention means for imparting a radially outward force to a body portion of the silica crucible.