WO200247805-A2 -- EP913357-A1   NGK INSULATORS LTD (NIGA)   ABE F;  JP61171530-A   HITACHI LTD (HITA)   KOYAMA K,  SUGITA N,  SAKAGUCHI H,  SHIINA K,  NOGUCHI Y;  US3509043-A   CHEVRON RES CO (CALI);  WO1999019249-A1   ;  WO1999020384-A1   ;  WO2001046068-A1   ;  US2004075084-A1 -- US3509043-A   CHEVRON RES CO (CALI);  US4027476-A   ROCKET RES CORP (ROCK-Non-standard)   SCHMIDT E W;  US4331451-A   MITSUI TOATSU CHEM INC (MITK);  TOYO ENGG CORP (TOXS)   ISOGAYA K,  SUGIYAMA E,  KIKUCHI K,  YOSHIDA K;  US5216875-A   ENGELHARD CORP (ENGH)   KENNELLY T,  FARRAUTO R J,  HOBSON M C,  WATERMAN E M;  US5980782-A   EXXON RES & ENG CO (ESSO)   HERSHKOWITZ F,  KOVEAL R J,  VELUSWAMY L R,  TAYLOR J H,  DECKMAN H W,  REYNOLDS R P,  GONATAS C,  FULTON J W,  SHOENMAN L,  ITO J;  US5980858-A   EBARA CORP (EBAR);  UBE IND LTD (UBEI)   FUJIMURA H,  HIRAYAMA Y,  FUJINAMI S,  NAGATO S,  HIROSE T,  OSHITA T,  IRIE M,  TAKANO K,  FUKUDA T;  US6071433-A   BP AMOCO CORP (BRPE)   BHATTACHARYYA A;  EP1341602-B1 -- EP913357-A1   NGK INSULATORS LTD (NIGA)   ABE F;  JP61171530-A   HITACHI LTD (HITA)   KOYAMA K,  SUGITA N,  SAKAGUCHI H,  SHIINA K,  NOGUCHI Y;  US3509043-A   CHEVRON RES CO (CALI);  WO1999019249-A1   ;  WO1999020384-A1   ;  WO2001046068-A1   ;  US7232532-B2 -- EP303438-A   DAVY MCKEE CORP (POGC)   DUNSTER M,  KORCHNAK J D;  EP913357-A1   NGK INSULATORS LTD (NIGA)   ABE F;  EP576096-A2   SHELL INT RES MIJ BV (SHEL)   VONKEMAN K A,  JACOBS L L G;  JP61171530-A   HITACHI LTD (HITA)   KOYAMA K,  SUGITA N,  SAKAGUCHI H,  SHIINA K,  NOGUCHI Y;  US3509043-A   CHEVRON RES CO (CALI);  US4027476-A   ROCKET RES CORP (ROCK-Non-standard)   SCHMIDT E W;  US4331451-A   MITSUI TOATSU CHEM INC (MITK);  TOYO ENGG CORP (TOXS)   ISOGAYA K,  SUGIYAMA E,  KIKUCHI K,  YOSHIDA K;  US5149464-A   GAS RES INST (GASR-Non-standard)   GREEN M L H;  US5216875-A   ENGELHARD CORP (ENGH)   KENNELLY T,  FARRAUTO R J,  HOBSON M C,  WATERMAN E M;  US5980782-A   EXXON RES & ENG CO (ESSO)   HERSHKOWITZ F,  KOVEAL R J,  VELUSWAMY L R,  TAYLOR J H,  DECKMAN H W,  REYNOLDS R P,  GONATAS C,  FULTON J W,  SHOENMAN L,  ITO J;  US5980858-A   EBARA CORP (EBAR);  UBE IND LTD (UBEI)   FUJIMURA H,  HIRAYAMA Y,  FUJINAMI S,  NAGATO S,  HIROSE T,  OSHITA T,  IRIE M,  TAKANO K,  FUKUDA T;  US6071433-A   BP AMOCO CORP (BRPE)   BHATTACHARYYA A;  WO1999019249-A1   ;  WO1999020384-A1   ;  WO1999037380-A1   ;  WO2001046068-A1   ;  WO200247805-A3 -- EP913357-A1   NGK INSULATORS LTD (NIGA)   ABE F;  JP61171530-A   HITACHI LTD (HITA)   KOYAMA K,  SUGITA N,  SAKAGUCHI H,  SHIINA K,  NOGUCHI Y;  US3509043-A   CHEVRON RES CO (CALI);  WO1999019249-A1   ;  WO1999020384-A1   ;  WO2001046068-A1