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:
Feb. 19, 2002
Filed:
Jan. 28, 2000
Masanao Tanaka, Ibaraki, JP;
Kazuya Sato, Ibaraki, JP;
Koichi Kato, Ibaraki, JP;
Yasuhiro Ito, Ibaraki, JP;
Hiroaki Yamazaki, Ibaraki, JP;
Masaki Hirooka, Ibaraki, JP;
Yoshiaki Kawatsu, Ibaraki, JP;
Japan Vilene Co., Ltd., Tokyo, JP;
Abstract
An alkaline battery separator comprising a fiber sheet containing, on outer surfaces of fibers forming a surface of the fiber sheet, a substance having a peak of a bond energy at 530.5 to 531.5 eV which is measured by an X-ray photoelectron spectrometer at a photoelectron-taking-off angle of about 30°; a fiber sheet containing a larger amount of carboxyl groups bonded to surfaces of fibers forming an inside of the fiber sheet than an amount of carboxyl groups bonded to outer surfaces of fibers forming a surface of the fiber sheet; or a fiber sheet capable of entrapping ammonia in an amount of 0.4 mmol/g or more in average is disclosed.