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. 12, 2011
Filed:
Jan. 31, 2007
Makoto Nagamatsu, Hyogo, JP;
Seiya Shimizu, Hyogo, JP;
Hidemitsu Kasahara, Hyogo, JP;
Hisakazu Hojo, Hyogo, JP;
Makoto Nagamatsu, Hyogo, JP;
Seiya Shimizu, Hyogo, JP;
Hidemitsu Kasahara, Hyogo, JP;
Hisakazu Hojo, Hyogo, JP;
Maruo Calcium Co., Ltd., Akashi-Shi, JP;
Sumitomo Chemical Co., Ltd., Tokyo, JP;
Abstract
A fine pore formation agent for a porous resin film is provided which comprises inorganic particles satisfying (a) 0.1≦D50≦1.5 (μm) (D50: average particle diameter of particles in 50% cumulative total by weight from the larger particle side by micro-track FRA), (b) Da≦20 (μm) (Da: maximum particle diameter by micro-track FRA), (c) 3≦Sw≦60 (m/g) (Sw: BET specific surface area measured by nitrogen adsorption method), (d) Ir≧1.0×10(Ω·cm) (Ir: volume resistivity (Ω·cm). The fine pore formation agent for a porous resin film is capable of providing a resin composition giving a porous resin film useful in uses for electric parts such as capacitors and battery separators.