US6572678-B1 -- JP01043329-A   ;  US3534528-A   ABCOR INC (ABCO);  US3616607-A   ;  US4119417-A   TOKYO SHIBAURA ELECTRIC CO (TOKE);  NIPPON ATOMIC IND (JAAT);  US4130403-A   COOLEY T E (COOL-Individual);  COADY A B (COAD-Individual)   COOLEY T E,  COADY A B;  US4180388-A   ;  US4180552-A   ;  US4264338-A   MONSANTO CO (MONS)   NULL H R;  US4386944-A   GENERAL ELECTRIC CO (GENE)   KIMURA S G;  US4435191-A   MONSANTO CO (MONS)   GRAHAM T E;  US4518399-A   MONSANTO CO (MONS)   CROSKELL H,  GRAHAM T E;  US4597777-A   MONSANTO CO (MONS)   GRAHAM T E;  US4639257-A   COSTAIN PETROCARBON LTD (COST-Non-standard)   DUCKETT M,  LIMB D I;  US4701187-A   AIR PROD & CHEM INC (AIRP)   CHOE J S,  AUVIL S R,  AGRAWAL R;  US4894068-A   PERMEA INC (PERM-Non-standard)   RICE A W;  US4931070-A   UNION CARBIDE CORP (UNIC)   PRASAD R;  US4963165-A   MEMBRANE TECHN & RE (MEMB-Non-standard)   BLUME I,  PINNAU I;  US5071451-A   MEMBRANE TECHN & RE (MEMB-Non-standard)   WIJMANS J G;  US5089033-A   MEMBRANE TECHN & RE (MEMB-Non-standard)   WIJMANS J G;  US5102432-A   UNION CARBIDE IND G (UNIC)   PRASAD R;  US5199962-A   MEMBRANE TECHN & RE (MEMB-Non-standard)   WIJMANS J G;  US5282969-A   PERMEA INC (PERM-Non-standard)   XU J;  US5314528-A   ;  US5401300-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   AMO K D,  TOY L G,  LOKHANDWALA K A,  BAKER R W;  US5407466-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   BAKER R W,  LOKHANDWALA K A;  US5407467-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   AMO K D,  LOKHANDWALA K A,  BAKER R W;  US5556449-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   BAKER R W,  LOKHANDWALA K A;  US5558698-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   BAKER R W,  LOKHANDWALA K A;  US5647227-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   LOKHANDWALA K;  US5669958-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   BAKER R W,  LOKHANDWALA K A,  PINNAU I,  SEGELKE S;  US5762685-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   LOKHANDWALA K A,  BAKER R W;  US6053965-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   LOKHANDWALA K A;  US6168649-B1   MESSER GRIESHEIM GMBH (MESG)   JENSVOLD J A,  JEANES T O;  US6361582-B1   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   PINNAU I,  HE Z,  DA COSTA A R,  AMO K D,  DANIELS R;  US6361583-B1   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   PINNAU I,  HE Z,  DA COSTA A R,  AMO K D,  DANIELS R;  US6425267-B1   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   BAKER R W,  LOKHANDWALA K A,  WIJMANS J G,  DA COSTA A R