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:
Aug. 05, 2008
Filed:
Feb. 12, 2004
Takao Ohno, Iwakuni, JP;
Jiro Sadanobu, Iwakuni, JP;
Tsutomu Nakamura, Iwakuni, JP;
Susumu Honda, Iwakuni, JP;
Toyoaki Ishiwata, Iwakuni, JP;
Takao Ohno, Iwakuni, JP;
Jiro Sadanobu, Iwakuni, JP;
Tsutomu Nakamura, Iwakuni, JP;
Susumu Honda, Iwakuni, JP;
Toyoaki Ishiwata, Iwakuni, JP;
Teijin Limited, Osaka, JP;
Abstract
A polymetaphenylene isophthalamide-based polymer porous film having a satisfactory porous structure that exhibits excellent gas permeability and heat resistance. It is produced by a process which comprises casting a dope of the polymetaphenylene isophthalamide-based polymer and coagulating it in a coagulating bath. The porous film may also contain inorganic whiskers, and a composite porous film may be formed in combination with a separate thermoplastic polymer film.