DE19817374-A1 -- DE4026154-A   ;  WO9954407-A2 -- DE19632285-A1   HOECHST AG (FARH)   KREUER K,  FUCHS A,  MAIER J,  FRANK G,  SOCZKA-GUTH T,  CLAUSS J;  EP354040-A   HOECHST CELANESE CORP (FARH)   CHUNG T S,  CHEN P N,  PROVINO V J;  US4020142-A   CELANESE CORP (CELA)   DAVIS H J,  THOMAS N W;  US4842740-A   HOECHST CELANESE CORP (FARH)   CHUNG T S,  CHEN P N,  PROVINO V J;  US4898917-A   HOECHST CELANESE CORP (FARH)   SANSONE M J;  US5008339-A   CALIFORNIA INST OF TECHN (CALY)   ANSON F C,  MONTGOMERY D D;  US5393432-A   BASIC IND BUREAU (NIIT)   TSUYUMOTO M,  SUGIMOTO M,  MAEDA Y,  TSUGAYA H;  US5525436-A   UNIV CASE WESTERN RESERVE (UCWR)   SAVINELL R F,  LITT M H;  US5599639-A   HOECHST CELANESE CORP (FARH)   OGATA N,  SANSONE M J,  ONORATO F J;  AU769177-B -- US4020142-A   CELANESE CORP (CELA)   DAVIS H J,  THOMAS N W;  EP1076676-B1 -- DE19632285-A1   HOECHST AG (FARH)   KREUER K,  FUCHS A,  MAIER J,  FRANK G,  SOCZKA-GUTH T,  CLAUSS J;  EP354040-A   HOECHST CELANESE CORP (FARH)   CHUNG T S,  CHEN P N,  PROVINO V J;  US4020142-A   CELANESE CORP (CELA)   DAVIS H J,  THOMAS N W;  US4842740-A   HOECHST CELANESE CORP (FARH)   CHUNG T S,  CHEN P N,  PROVINO V J;  US4898917-A   HOECHST CELANESE CORP (FARH)   SANSONE M J;  US5008339-A   CALIFORNIA INST OF TECHN (CALY)   ANSON F C,  MONTGOMERY D D;  US5393432-A   BASIC IND BUREAU (NIIT)   TSUYUMOTO M,  SUGIMOTO M,  MAEDA Y,  TSUGAYA H;  US5525436-A   UNIV CASE WESTERN RESERVE (UCWR)   SAVINELL R F,  LITT M H;  US5599639-A   HOECHST CELANESE CORP (FARH)   OGATA N,  SANSONE M J,  ONORATO F J;  US6723757-B1 -- DE4026154-A   ;  DE19632285-A1   HOECHST AG (FARH)   KREUER K,  FUCHS A,  MAIER J,  FRANK G,  SOCZKA-GUTH T,  CLAUSS J;  EP354040-A   HOECHST CELANESE CORP (FARH)   CHUNG T S,  CHEN P N,  PROVINO V J;  US4020142-A   CELANESE CORP (CELA)   DAVIS H J,  THOMAS N W;  US4842740-A   HOECHST CELANESE CORP (FARH)   CHUNG T S,  CHEN P N,  PROVINO V J;  US4898917-A   HOECHST CELANESE CORP (FARH)   SANSONE M J;  US5008339-A   CALIFORNIA INST OF TECHN (CALY)   ANSON F C,  MONTGOMERY D D;  US5393432-A   BASIC IND BUREAU (NIIT)   TSUYUMOTO M,  SUGIMOTO M,  MAEDA Y,  TSUGAYA H;  US5525436-A   UNIV CASE WESTERN RESERVE (UCWR)   SAVINELL R F,  LITT M H;  US5599639-A   HOECHST CELANESE CORP (FARH)   OGATA N,  SANSONE M J,  ONORATO F J;  US6194474-B1   UNIV STUTTGART LEHRSTUHL & INST CHEM VER (UYST-Non-standard)   KERRES J,  CUI W;  US6300381-B1   UNIV STUTTGART LEHRSTUHL & INST CHEM VER (UYST-Non-standard)   KERRES J,  CUI W;  JP3688201-B2 -- JP11503262-W   UNIV CASE WESTERN RESERVE (UCWR)   SAVINELL R F,  LITT M H;  JP2000517462-W   HOECHST AG (FARH)   KREUER K,  FUCHS A,  MAIER J,  FRANK G,  SOCZKA-GUTH T,  CLAUSS J;  US4020142-A   CELANESE CORP (CELA)   DAVIS H J,  THOMAS N W;  US5008339-A   CALIFORNIA INST OF TECHN (CALY)   ANSON F C,  MONTGOMERY D D;  WO1998007164-A1