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. 22, 2008
Filed:
Aug. 09, 2001
Applicants:
Toshiaki Takase, Ibaraki, JP;
Yoshihiko Kondo, Ibaraki, JP;
Noriko Miyaguchi, Ibaraki, JP;
Masanao Tanaka, Ibaraki, JP;
Inventors:
Toshiaki Takase, Ibaraki, JP;
Yoshihiko Kondo, Ibaraki, JP;
Noriko Miyaguchi, Ibaraki, JP;
Masanao Tanaka, Ibaraki, JP;
Assignee:
Japan Vilene Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D04H 1/00 (2006.01); D04H 1/04 (2006.01); D04H 1/40 (2006.01); D04H 1/54 (2006.01); H01M 2/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed is a battery separator consisting essentially of a nonwoven fabric having a substantially unilayered structure, wherein an apparent total surface area of fibers per a surface density of the nonwoven fabric is 20 mor more, a thickness of the nonwoven fabric is 0.1 mm or less, a uniformity index of the nonwoven fabric is 0.15 or less, and the nonwoven fabric contains fine fibers having a fiber diameter of 4 μm or less.