WO200001478-A1 -- EP486384-A1   ;  EP519073-A1   TAKEDA CHEM IND LTD (TAKE);  MIZUSAWA IND CHEM LTD (MIZA)   TAKEUCHI T,  MOURI M,  OKABAYASHI S,  MIYAMURA S;  EP826631-A1   TOSOH CORP (TOYJ)   FUNAKOSHI H,  SHIRAKURA Y,  YATSUNAMI S,  YAMAMOTO K,  OGAWA N,  MORI T,  HARADA A;  US5173462-A   ;  US6183539-B1 -- EP486384-A1   ;  EP519073-A1   TAKEDA CHEM IND LTD (TAKE);  MIZUSAWA IND CHEM LTD (MIZA)   TAKEUCHI T,  MOURI M,  OKABAYASHI S,  MIYAMURA S;  EP826631-A1   TOSOH CORP (TOYJ)   FUNAKOSHI H,  SHIRAKURA Y,  YATSUNAMI S,  YAMAMOTO K,  OGAWA N,  MORI T,  HARADA A;  GB1051621-A   ;  GB1508928-A   LEITZ GMBH ERNST (LEIT);  US2882244-A   ;  US3078635-A   ;  US3078639-A   ;  US3751878-A   UNION CARBIDE CORP (UNIC);  US3865924-A   INST GAS TECHNOLOGY (IGTE)   GIDASPOW D,  ONISCHAK M;  US3885927-A   UNION CARBIDE CORP (UNIC)   SHERMAN J D,  ROSS R J;  US3981698-A   CJB DEV LTD (CJBD-Non-standard);  US4039620-A   A-T-O INC (ATOI)   NETTELAND L G,  HEINTZ C E;  US4433981-A   SHELL OIL CO (SHEL)   SLAUGH L H,  WILLIS C L;  US4477267-A   ;  US4493715-A   PHILLIPS PETROLEUM CO (PHIP)   HOGAN J P,  NEASE C R;  US4711645-A   AIR PROD & CHEM INC (AIRP)   KUMAR R;  US4775396-A   UNION CARBIDE CORP (UNIC);  UOP (UNVO)   RASTELLI H,  CHAO C C,  GARG D R;  US4986835-A   SEITETSU KAGAKU CO LTD (SEIT)   UNO M,  INOUE K,  UEDA K,  KAJI S;  US5156657-A   ;  US5173462-A   ;  US5203887-A   PRAXAIR TECHNOLOGY INC (PRAX)   TOUSSAINT L J;  US5531808-A   BOC GROUP INC (BRTO)   OJO A F,  FITCH F F,  BUELOW M;  US5587003-A   BOC GROUP INC (BRTO)   BUELOW M,  DAO L,  FITCH F;  US5674311-A   PRAXAIR TECHNOLOGY INC (PRAX)   NOTARO F,  MULLHAUPT J T,  LEAVITT F W,  ACKLEY M W E;  US6530975-B2 -- EP486384-A1   ;  EP519073-A1   TAKEDA CHEM IND LTD (TAKE);  MIZUSAWA IND CHEM LTD (MIZA)   TAKEUCHI T,  MOURI M,  OKABAYASHI S,  MIYAMURA S;  EP826631-A1   TOSOH CORP (TOYJ)   FUNAKOSHI H,  SHIRAKURA Y,  YATSUNAMI S,  YAMAMOTO K,  OGAWA N,  MORI T,  HARADA A;  GB1051621-A   ;  GB1508928-A   LEITZ GMBH ERNST (LEIT);  US2882244-A   ;  US3078635-A   ;  US3078639-A   ;  US3751878-A   UNION CARBIDE CORP (UNIC);  US3865924-A   INST GAS TECHNOLOGY (IGTE)   GIDASPOW D,  ONISCHAK M;  US3885927-A   UNION CARBIDE CORP (UNIC)   SHERMAN J D,  ROSS R J;  US3981698-A   CJB DEV LTD (CJBD-Non-standard);  US4039620-A   A-T-O INC (ATOI)   NETTELAND L G,  HEINTZ C E;  US4433981-A   SHELL OIL CO (SHEL)   SLAUGH L H,  WILLIS C L;  US4477267-A   ;  US4493715-A   PHILLIPS PETROLEUM CO (PHIP)   HOGAN J P,  NEASE C R;  US4711645-A   AIR PROD & CHEM INC (AIRP)   KUMAR R;  US4775396-A   UNION CARBIDE CORP (UNIC);  UOP (UNVO)   RASTELLI H,  CHAO C C,  GARG D R;  US4986835-A   SEITETSU KAGAKU CO LTD (SEIT)   UNO M,  INOUE K,  UEDA K,  KAJI S;  US5156657-A   ;  US5173462-A   ;  US5203887-A   PRAXAIR TECHNOLOGY INC (PRAX)   TOUSSAINT L J;  US5531808-A   BOC GROUP INC (BRTO)   OJO A F,  FITCH F F,  BUELOW M;  US5587003-A   BOC GROUP INC (BRTO)   BUELOW M,  DAO L,  FITCH F;  US5674311-A   PRAXAIR TECHNOLOGY INC (PRAX)   NOTARO F,  MULLHAUPT J T,  LEAVITT F W,  ACKLEY M W E;  US6183539-B1   ZEOCHEM LLC (ZEOC-Non-standard)   RODE E J,  TSYBULEVSKIY A M;  EP1105213-B1 -- EP486384-A1   ;  EP519073-A1   TAKEDA CHEM IND LTD (TAKE);  MIZUSAWA IND CHEM LTD (MIZA)   TAKEUCHI T,  MOURI M,  OKABAYASHI S,  MIYAMURA S;  EP826631-A1   TOSOH CORP (TOYJ)   FUNAKOSHI H,  SHIRAKURA Y,  YATSUNAMI S,  YAMAMOTO K,  OGAWA N,  MORI T,  HARADA A;  US5173462-A