Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Nozomu Tanihara0
Toshimune Yoshinaga0
Yutaka Kanetsuki0
Hiroshi Uchida0
Kenji Fukunaga0
Minoru Shigemura0
Date of Patent
August 10, 2010
0Patent Application Number
117958920
Date Filed
January 19, 2006
0Patent Primary Examiner
Patent 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.
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