Polyimide gas separation membranes

Details Polyimide gas separation membranes Polyimide gas separation membranes

Filed on

1993-10-04

Date issued

1994-08-02

Examiner

Kight, III, John

Patent Class

Synthetic resins or natural rubbers -- part of the class 520 ser

SubClass

Synthetic resins

SubSubClass

From carboxylic acid or derivative thereof

Other Related Categories

528172, 528173, 528176, 528183, 528185, 528188, 528220, 528229, 528350, 2105001, 21050021, 96 14, 95 54, C08G 7310, B01D 5322, B01D 7164

Type

Patent

Status

active

Patent number

053346971

Description

ABSTRACT:
A polyimide gas separation membrane containing repeating units derived from 9,9-disubstituted xanthene dianhydride is disclosed.

REFERENCES:
patent: 5045093 (1991-09-01), Meier et al.
patent: 5051520 (1991-09-01), Trofimenko
patent: 5067970 (1991-11-01), Wang et al.
patent: 5097000 (1992-03-01), Trofimenko
patent: 5101004 (1992-03-01), Trofimenko
patent: 5112941 (1992-05-01), Kasai et al.
patent: 5160353 (1992-11-01), Gochanour
patent: 5178650 (1993-01-01), Hayes
patent: 5234471 (1993-08-01), Weinberg

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