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:
Oct. 09, 2012
Filed:
Jun. 22, 2005
Junichirou Nakashima, Shunan, JP;
Satoru Wakamatsu, Shunan, JP;
Manabu Sakita, Shunan, JP;
Tokuyama Corporation, Shunan-shi, JP;
Abstract
A cylindrical vessel made of carbon is used in the production of silicon. The inner surface of the vessel comes into contact with a silicon melt, wherein the permeation with silicon melt is reduced, formation of SiC is suppressed, and the vessel is resistant to deformation even when volumetric expansion ascribable to silicon is brought about. The carbon-made cylindrical vessel is made of a carbon material having a bulk specific gravity of 1.8 or more. The thermal expansion coefficient of the carbon material at 350 to 450° C. is preferably 3.5×10/° C. to 6.0×10/° C. A process for producing silicon uses said vessel wherein a chlorosilane is reacted with hydrogen.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile