WO200292673-A1 -- CN1207398-A   TIANJIN TEXTILE ENG COLLEGE (TIAN-Non-standard)   CUI Y,  GE J;  DE19929482-A1   UNIV STUTTGART (UYST-Non-standard)   KERRES J;  EP335614-A   DU PONT CANADA INC (DUPO)   STEVENS K E,  COUGHLIN M C,  MOSS A Z;  EP464718-A   UNION CARBIDE IND G (UNIC);  EP335614-A3   DU PONT CANADA INC (DUPO)   STEVENS K E,  COUGHLIN M C,  MOSS A Z;  US5670051-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   PINNAU I,  TOY L G,  CASILLAS C;  US5744183-A   ELLSWORTH R M (ELLS-Individual);  BURNS G (BURN-Individual)   ELLSWORTH R M,  BURNS G;  WO1997044121-A1   ;  US2004191522-A1 -- US4791144-A   TOKUYAMA SODA KK (TOKU)   NAGO K,  NAKAMURA S;  US4842741-A   DU PONT CANADA INC (DUPO)   COUGHLIN M C,  MOSS A Z,  STEVENS K E;  US5229465-A   UNION CARBIDE IND G (UNIC);  US5498339-A   DSM NV (STAM);  NEDERLANDSE ORG TOEGEPAST (NEDE)   CREUSEN R J M,  HENDRIKS E C A,  HANEMAAIJER J H;  US5670051-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   PINNAU I,  TOY L G,  CASILLAS C; 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