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. 10, 2010
Filed:
Jan. 19, 2006
Toshimune Yoshinaga, Chiba, JP;
Kenji Fukunaga, Chiba, JP;
Yutaka Kanetsuki, Yamaguchi, JP;
Hiroshi Uchida, Yamaguchi, JP;
Minoru Shigemura, Yamaguchi, JP;
Nozomu Tanihara, Yamaguchi, JP;
Toshimune Yoshinaga, Chiba, JP;
Kenji Fukunaga, Chiba, JP;
Yutaka Kanetsuki, Yamaguchi, JP;
Hiroshi Uchida, Yamaguchi, JP;
Minoru Shigemura, Yamaguchi, JP;
Nozomu Tanihara, Yamaguchi, JP;
Ube Industries, Ltd., Yamaguchi, JP;
Abstract
An asymmetric hollow-fiber gas separation membrane is made of a soluble aromatic polyimide that is composed of a specific repeating unit. The tetracarboxylic acid component of the unit has a diphenylhexafluoropropane structure and a biphenyl structure. The diamine component of the unit essentially contains diaminobenzoic acids and any of diaminodibenzothiophenes, diaminodibenzothiophene=5,5-dioxides, diaminothioxanthene-10,10-diones, and diaminothioxanthene-9,10,10-triones.