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. 18, 1996
Filed:
Feb. 15, 1995
Applicant:
Inventors:
Fusaji Kita, Suita, JP;
Akira Kato, Toride, JP;
Tomohiro Harada, Takatsuki, JP;
Akira Kawakami, Takatsuki, JP;
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
429247 ; 429194 ; 429196 ; 429249 ; 429250 ;
Abstract
A layer built cell with improved safety having at least one pair of positive and negative electrodes, an electrolytic solution and at least one separator which is present between the pair of electrodes. The separator has a liquid retention rate of at least 1.5 cc/g, the retention rate having been measured relative to retention of propylene carbonate.