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Asumaru Nakamura, Yoshihiro Kusuki, Takashi Harada: Aromatic imide polymer hollow filaments. Agency of Industrial Science and Technology, Burgess Ryan and Wayne, May 16, 1989: US04830640 (18 worldwide citation)

An aromatic imide polymer hollow filament having an excellent gas separating property is produced by a process comprising the steps of:


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Asumaru Nakamura, Yoshihiro Kusuki, Takashi Harada: Process for producing aromatic imide polymer hollow filaments. Director General of Agency of Industrial Science & Technology, Burgess Ryan & Wayne, July 3, 1990: US04938902 (2 worldwide citation)

An aromatic imide polymer hollow filament having an excellent gas separating property is produced by a process comprising the steps of: