WO200023510-A1 -- DD283478-A   ;  EP875524-A2   JOHNSON MATTHEY PLC (JOHO)   DENTON J,  GASCOYNE J M,  HARDS G A,  RALPH T R;  JP06304548-A   ;  JP57159502-A   ;  US4842620-A   PPG IND INC (PITT)   HAMMEL J J,  ROBERTSON W J,  MARSHALL W P,  BARCH R W,  DAS B,  SMOOT M A,  BEAVER R P;  US5523181-A   TANAKA KIKINZOKU KOGYO KK (TANI);  STONEHART ASSOC INC (STON-Non-standard);  WATANABE T (WATA-Individual)   STONEHART P,  WATANABE M;  US5547551-A   GORE & ASSOC INC W L (GORE)   ZUCKERBROD D,  HOBSON A R,  BAHAR B,  KOLDE J A;  EP1129128-B1 -- DD283478-A   ;  EP875524-A2   JOHNSON MATTHEY PLC (JOHO)   DENTON J,  GASCOYNE J M,  HARDS G A,  RALPH T R;  JP06304548-A   ;  JP57159502-A   ;  US4842620-A   PPG IND INC (PITT)   HAMMEL J J,  ROBERTSON W J,  MARSHALL W P,  BARCH R W,  DAS B,  SMOOT M A,  BEAVER R P;  US5523181-A   TANAKA KIKINZOKU KOGYO KK (TANI);  STONEHART ASSOC INC (STON-Non-standard);  WATANABE T (WATA-Individual)   STONEHART P,  WATANABE M;  US5547551-A   GORE & ASSOC INC W L (GORE)   ZUCKERBROD D,  HOBSON A R,  BAHAR B,  KOLDE J A;  US2004266299-A1 -- US3282875-A   DU PONT DE NEMOURS & CO E I (DUPO);  US4329435-A   ASAHI KASEI KOGYO KK (ASAH);  US4330654-A   DOW CHEM CO (DOWC)   EZZELL B R,  CARL W P,  MOD W A;  US4358545-A   DOW CHEM CO (DOWC)   EZZELL B R,  CARL W P,  MOD W A;  US4417969-A   DOW CHEM CO (DOWC)   EZZELL B R,  CARL W P,  MOD W A;  US4433082-A   DU PONT DE NEMOURS & CO E I (DUPO)   GROT W G;  US4610762-A   DOW CHEM CO (DOWC)   BIRDWELL J D;  US4842620-A   PPG IND INC (PITT)   HAMMEL J J,  ROBERTSON W J,  MARSHALL W P,  BARCH R W,  DAS B,  SMOOT M A,  BEAVER R P;  US4940525-A   DOW CHEM CO (DOWC)   EZZELL B R,  CARL W P;  US5094995-A   DU PONT DE NEMOURS & CO E I (DUPO)   BUTT M H,  WALLER F J;  US5438082-A   HOECHST AG (FARH)   HELMER-METZMANN F,  OSAN F,  SCHNELLER A,  RITTER H,  LEDJEFF K,  NOLTE R,  THORWIRTH R;  US5468574-A   DAIS CORP (DAIS-Non-standard)   RIDER J N,  SERPICO J,  EHRENBERG S G,  WNEK G E;  US5523181-A   TANAKA KIKINZOKU KOGYO KK (TANI);  STONEHART ASSOC INC (STON-Non-standard);  WATANABE T (WATA-Individual)   STONEHART P,  WATANABE M;  US5547551-A   GORE & ASSOC INC W L (GORE)   ZUCKERBROD D,  HOBSON A R,  BAHAR B,  KOLDE J A;  US5595676-A   IMPERIAL CHEM IND PLC (ICIL)   BARNES D J,  GILDAY J P;  US5599639-A   HOECHST CELANESE CORP (FARH)   OGATA N,  SANSONE M J,  ONORATO F J;  US6042958-A   JOHNSON MATTHEY PLC (JOHO)   DENTON J,  GASCOYNE J M,  HARDS G A,  RALPH T R