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:
Jun. 12, 2001
Filed:
Mar. 24, 1998
Nippon Crucible, Co., Ltd., Tokyo, JP;
Abstract
The present invention is directed to molten metal vessels and molten metal holding furnaces containing a molten metal vessel. The molten metal vessel has a double-layer structure that includes an inner layer vessel in the form of a nonoxide-containing fired casting, and an outer vessel layer made from a calcium silicate refractory. The inner layer of nonoxide-containing fired casting can be obtained by firing in a reduced atmosphere a box-shaped vessel having an open upper side and prepared by casting a monolithic refractory comprising primarily of a silicon carbide material or silicon nitride material. The outer vessel layer of calcium silicate refractory can be obtained by casting calcium silicate monolithic refractory around the inner vessel layer, and thereafter curing, solidifying and drying the resulting casting.