US6630011-B1 -- US3616607-A   ;  US4386944-A   GENERAL ELECTRIC CO (GENE)   KIMURA S G;  US4435191-A   MONSANTO CO (MONS)   GRAHAM T E;  US4597777-A   MONSANTO CO (MONS)   GRAHAM T E;  US4894068-A   PERMEA INC (PERM-Non-standard)   RICE A W;  US5042992-A   GRACE & CO-CONN W R (GRAC);  BLINKA T A (BLIN-Individual)   BLINKA T A,  ITATANI H,  WANG I F;  US5051114-A   DU PONT CANADA INC (DUPO)   NEMSER S M,  ROMAN I C;  US5071451-A   MEMBRANE TECHN & RE (MEMB-Non-standard)   WIJMANS J G;  US5281255-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   BAKER R W,  TOY L G,  PINNAU I;  US5482539-A   ENERFEX INC (ENER-Non-standard)   CALLAHAN R 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;  US5707423-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   MORISATO A,  PINNAU I;  US5879431-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   BAKER R W,  LOKHANDWALA K A,  PINNAU I,  SEGELKE S;  US5964923-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   LOKHANDWALA K A;  US6035641-A   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   LOKHANDWALA K A;  US6096114-A   AMERICAN AIR LIQUIDE INC (AIRL);  AIR LIQUIDE CANADA LTEE (AIRL)   LI Y,  MEIMARI M;  US6168649-B1   MESSER GRIESHEIM GMBH (MESG)   JENSVOLD J A,  JEANES T O;  US6221131-B1   GKSS FORSCHUNGSZENTRUM GEESTHACHT GMBH (KNVS);  PETROBRAS PETROLEO BRASIL SA (PETB)   BEHLING R,  PEINEMANN K,  OHLROGGE K,  WIND J,  DA SILVA L B;  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;  US6428606-B1   MEMBRANE TECHNOLOGY & RES INC (MEMB-Non-standard)   GOTTSCHLICH D,  RINGER M