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:
Jul. 28, 1998
Filed:
Sep. 19, 1996
Applicant:
Inventors:
Tomonori Tsuchimoto, Hashima-Gun, JP;
Katsuichi Iwata, Ichinomiya, JP;
Yoshihiko Kurashima, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ; H01M / ;
U.S. Cl.
CPC ...
75375 ; 75408 ; 75589 ; 75592 ; 266 94 ; 266205 ; 429 49 ;
Abstract
A process for recovering Na from a spent NaS cell, includes the steps of forming an opening in a spent NaS cell, flowing down molten Na from an interior of the NaS cell through the opening in a heating oil vessel, passing the molten Na through a filter placed in the heating oil vessel to remove metallic powder, collecting the molten Na in a bottom portion of the heating oil vessel by utilizing a difference in specific gravity between the molten Na and an oil, and taking out the Na from an outer side of the filter.