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:
Jan. 11, 2011
Filed:
Nov. 29, 2005
Masanori Sueoka, Otsu, JP;
Kenta Nishihara, Takatsuki, JP;
Akimitsu Tsukuda, Otsu, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
The problem addressed by this invention is to provide an aromatic polyamide porous film excellent in the capability of being thinned and capable of easily exhibiting stable porosity properties even if it is used for a long period of time at high temperature. This invention can be achieved by an aromatic polyamide porous film that contains an aromatic polyamide as a main component and is such that when an atomic force microscope is used to measure a range of S μmat least on one surface, the sectional area S(10) μmobtained at a depth of 10 nm from the surface and the sectional area S(20) μmobtained at a depth of 20 nm from the surface satisfy the following formulae simultaneously.0.01≦(10)/≦0.35≦(20)/(10)≦20