WO9930093-A2 -- GB1539604-A   ;  SU1730511-A1   ;  US5737940-A   PHILLIPS PETROLEUM CO (PHIP)   YAO J,  HOUSER C G,  LOW W R,  DEVERS B J;  US5779863-A   AIR LIQUIDE AMERICA CORP (AIRL);  AIR LIQUIDE PROCESS & CONSTR (AIRL)   HA B,  ARCURI T;  US5992175-A -- GB1539604-A   ;  RU1730511-A   ;  US3592015-A   MESSER GRIESHEIM GMBH (MESG);  US4171964-A   ORTLOFF CORP (ORTL-Non-standard)   CAMPBELL R E,  WILKINSON J D,  RAMBO C L;  US4251249-A   RANDALL CORP (RAND-Non-standard)   GULSBY J G;  US4278457-A   ORTLOFF CORP (ORTL-Non-standard)   CAMPBELL R E,  WILKINSON J D;  US4318723-A   HELIX TECHN CORP (HELI-Non-standard);  KOCH PROCESSES LTD (KOCH)   HOLMES A S,  RYAN J M;  US4350511-A   KOCH PROCESS SYSTEMS INC (KOCH)   HOLMES A S,  RYAN J M;  US4596588-A   GULSBY ENG INC (GULS-Non-standard)   COOK G D;  US4617038-A   ;  US4680042-A   EL PASO HYDROCARBONS (ELPA);  ADV EXTRACTION TECH (ADEX-Non-standard)   MEHRA Y R;  US4687499-A   MCDERMOTT INT INC (MCDE-Non-standard)   AGHILI H K;  US4690702-A   CIE FR ETUD CONS TE (FRCO-Non-standard);  TECHNIP CIE FR ETUD (TCHP)   PARADOWSKI H,  CASTEL J,  PARFAIT H;  US4692179-A   EL PASO HYDROCARBONS (ELPA);  ADV EXTRACTION TECH (ADEX-Non-standard)   MEHRA Y R;  US4698081-A   MCDERMOTT INT INC (MCDE-Non-standard)   AGHILI H K;  US4851020-A   MCDERMOTT INT INC (MCDE-Non-standard)   MONTGOMERY G J;  US4885063-A   ;  US5275005-A   ELCOR CORP (ELCO-Non-standard)   HUDSON H M,  CAMPBELL R E,  WILKINSON J D;  US5421165-A   ELF AQUITAINE PRODN (ERAP)   PARADOWSKI H,  MANGIN C,  BLANC C;  US5566554-A   KTI FISH INC (KTIF-Non-standard)   OSTASZEWSKI R J,  VIJAYARAGHAVAN B;  US5588306-A   LINDE AG (LINM)   SCHMIDT H;  US5600969-A   PHILLIPS PETROLEUM CO (PHIP)   LOW W R;  US5737940-A   PHILLIPS PETROLEUM CO (PHIP)   YAO J,  HOUSER C G,  LOW W R,  DEVERS B J;  US5779863-A   AIR LIQUIDE AMERICA CORP (AIRL);  AIR LIQUIDE PROCESS & CONSTR (AIRL)   HA B,  ARCURI T;  AU747148-B -- GB1539604-A   ;  US5737940-A   PHILLIPS PETROLEUM CO (PHIP)   YAO J,  HOUSER C G,  LOW W R,  DEVERS B J;  US5779863-A   AIR LIQUIDE AMERICA CORP (AIRL);  AIR LIQUIDE PROCESS & CONSTR (AIRL)   HA B,  ARCURI T