WO2003035611-A1 -- GB1281736-A   ;  US3546180-A   ;  US4758498-A   ;  US6063522-A   MINNESOTA MINING & MFG CO (MINN)   HAMROCK S J,  PHAM P T;  US6683209-B2 -- GB1281736-A   ;  US3546180-A   ;  US4505997-A   ANVAR AGENCE NAT VALORISATION (ANVR);  SOC MAT ELF AQUITAINE (ERAP);  HYDRO-QUEBEC (QUGO)   ARMAND M,  ELKADIRICH F;  US4758498-A   ;  US5072040-A   CNRS CENT NAT RECH SCI (CNRS);  HYDRO-QUEBEC (QUGO)   ARMAND M;  US5273840-A   COVALENT ASSOC INC (COVA-Non-standard)   DOMINEY L A;  US5463005-A   GAS RES INST (GASR-Non-standard)   DESMARTEAU D D;  US5514493-A   MINNESOTA MINING & MFG CO (MINN)   LAMANNA W M,  HAMROCK S J,  KRAUSE L J,  WADDELL J E,  MOORE G G I;  US5652072-A   MINNESOTA MINING & MFG CO (MINN)   LAMANA W M,  KRAUSE L J,  SUMMERFIELD J W;  US5827602-A   COVALENT ASSOC INC (COVA-Non-standard)   CARLIN R T,  KOCH V R,  NANJUNDIAH C;  US5879828-A   MINNESOTA MINING & MFG CO (MINN)   ZIEGLER R J,  POIRIER R J,  DEBE M K,  WACKERFUSS M K;  US5965054-A   COVALENT ASSOC INC (COVA-Non-standard)   MCEWEN A B,  EIN-ELI Y;  US6063522-A   MINNESOTA MINING & MFG CO (MINN)   HAMROCK S J,  PHAM P T;  US6090895-A   MINNESOTA MINING & MFG CO (MINN)   MAO S S,  HAMROCK S J,  YLITALO D A;  US6727386-B2 -- GB1281736-A   ;  US3546180-A   ;  US4505997-A   ANVAR AGENCE NAT VALORISATION (ANVR);  SOC MAT ELF AQUITAINE (ERAP);  HYDRO-QUEBEC (QUGO)   ARMAND M,  ELKADIRICH F;  US4758498-A   ;  US5072040-A   CNRS CENT NAT RECH SCI (CNRS);  HYDRO-QUEBEC (QUGO)   ARMAND M;  US5273840-A   COVALENT ASSOC INC (COVA-Non-standard)   DOMINEY L A;  US5463005-A   GAS RES INST (GASR-Non-standard)   DESMARTEAU D D;  US5514493-A   MINNESOTA MINING & MFG CO (MINN)   LAMANNA W M,  HAMROCK S J,  KRAUSE L J,  WADDELL J E,  MOORE G G I;  US5652072-A   MINNESOTA MINING & MFG CO (MINN)   LAMANA W M,  KRAUSE L J,  SUMMERFIELD J W;  US5827602-A   COVALENT ASSOC INC (COVA-Non-standard)   CARLIN R T,  KOCH V R,  NANJUNDIAH C;  US5879828-A   MINNESOTA MINING & MFG CO (MINN)   ZIEGLER R J,  POIRIER R J,  DEBE M K,  WACKERFUSS M K;  US5965054-A   COVALENT ASSOC INC (COVA-Non-standard)   MCEWEN A B,  EIN-ELI Y;  US6063522-A   MINNESOTA MINING & MFG CO (MINN)   HAMROCK S J,  PHAM P T;  US6090895-A   MINNESOTA MINING & MFG CO (MINN)   MAO S S,  HAMROCK S J,  YLITALO D A;  EP1438287-A1 -- DE877143-C   ;  JP4723184-B2 -- JP62089047-A   ;  JP2000082494-A   SANYO CHEM IND LTD (SANN)   NAKANO T;  JP77007012-B   ;  NL7005873-A   ;  US3546180-A   ;  WO1998050349-A1   ;  WO1999038842-A1   ;  WO1999049529-A1   ;  JP5905664-B2 -- JP72008244-A   ;  JP2000082494-A   SANYO CHEM IND LTD (SANN)   NAKANO T;  WO1999049529-A1   ;  JP5905946-B2 -- JP07028244-A   ;  JP2000082494-A   SANYO CHEM IND LTD (SANN)   NAKANO T;  JP2001512714-A   MERCK PATENT GMBH (MERE)   SARTORI P,  JUESCHKE R;  WO1999030381-A1   ;  WO1999049529-A1