FR2817772-A1 -- EP453669-A   UOP INC (UNVO)   CHAO C C,  RASTELLI H;  EP862936-A2   AIR PROD & CHEM INC (AIRP)   ALLAM R J,  TAYLOR F W,  GOLDEN T C,  KALBASSI M A;  EP904825-A2   BOC GROUP INC (BRTO)   JAIN R,  DENG S;  FR2792850-A1   AIR LIQUIDE SA (AIRL)   THONNELIER J,  LLEDOS B,  LABASQUE J,  CRAYSSAC F;  US4048111-A   UOP INC (UNVO)   ROSBACK D H,  NEUZIL R W;  US4376103-A   STANDARD OIL CO INDIANA (STAD)   BERTOLACIN R J,  HIRSCHBERG E H,  MODICA F S;  US4751211-A   ALUMINUM CO OF AMERICA (ALUM)   FLEMING H L;  US5130282-A   ;  US5194244-A   SHELL OIL CO (SHEL)   BROWNSCOMBE T F,  SLAUGH L H;  US6013600-A   LAROCHE IND INC (HOFF)   KANAZIREV V I;  US6632766-B2 -- JP07048319-A   ;  JP09059204-A   ;  US4069172-A   TORAY IND INC (TORA);  US4376103-A   STANDARD OIL CO INDIANA (STAD)   BERTOLACIN R J,  HIRSCHBERG E H,  MODICA F S;  US4481104-A   ;  US4686198-A   ALUMINUM CO OF AMERICA (ALUM)   BUSH J F,  MYDOCK D R;  US4717483-A   ALUMINUM CO OF AMERICA (ALUM)   BUSH J F,  FLEMING H L;  US4751211-A   ALUMINUM CO OF AMERICA (ALUM)   FLEMING H L;  US4762537-A   ALUMINUM CO OF AMERICA (ALUM)   FLEMING H L,  GOODBOY K P,  SAFORO E K;  US4808742-A   ALUMINUM CO OF AMERICA (ALUM)   FLEMING H L;  US5068483-A   CNRS CENT NAT RECH SCI (CNRS);  ELF AQUITAINE (ERAP)   BARTHOMEUF D,  QUENACHDEQ V;  US5194244-A   SHELL OIL CO (SHEL)   BROWNSCOMBE T F,  SLAUGH L H;  US5672799-A   ENIRICERCHE SPA (ENIE);  ENICHEM SYNTHESIS SPA (ENIE);  ENICHEM SPA (ENIE)   PEREGO C,  PAZZUCONI G,  GIROTTI G,  TERZONI G;  US6013600-A   LAROCHE IND INC (HOFF)   KANAZIREV V I;  US6090738-A   ;  US6423658-B1   AIR LIQUIDE SA (AIRL)   THONNELIER J,  LLEDOS B,  LABASQUE J,  CRAYSSAC F;  AU778104-B2 -- US5194244-A   SHELL OIL CO (SHEL)   BROWNSCOMBE T F,  SLAUGH L H;  JP4185279-B2 -- JP10263392-A   AIR PROD & CHEM INC (AIRP)   ALLAM R J,  TAYLOR F W,  GOLDEN T C,  KALBASSI M A;  JP49091092-A   UNIVERSAL OIL PROD CO (UNVO);  JP57196720-A   ;  US4762537-A   ALUMINUM CO OF AMERICA (ALUM)   FLEMING H L,  GOODBOY K P,  SAFORO E K;  KR807160-B1 -- US6013600-A   LAROCHE IND INC (HOFF)   KANAZIREV V I;  US6090738-A   ;  US6423658-B1   AIR LIQUIDE SA (AIRL)   THONNELIER J,  LLEDOS B,  LABASQUE J,  CRAYSSAC F