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 US6534028-B2   DEGUSSA AG (DEGS)   VON HIPPEL L,  ARNTZ D,  KUTTRUF B,  WALTER B;  US6682711-B2   CHEVRON USA INC (CALI)   MOTAL R J,  O'REAR D J;  US6816513-B2   WANG Z (WANG-Individual);  WANG Y (WANG-Individual);  GHEEN A (GHEE-Individual)   WANG Z,  WANG Y,  GHEEN A;  US6818028-B2   KELLOGG BROWN & ROOT INC (PULL)   BARNETT D,  CARGLE G B;  US7012103-B2   CONOCOPHILLIPS CO (CONO)   ESPINOZA R L,  ZHANG J,  WRIGHT H A,  HARKINS T H;  US7435401-B2   KELLOGG BROWN & ROOT INC (PULL)   STRAIT R B,  BARNETT D J;  US7513919-B2   KELLOGG BROWN & ROOT INC (PULL)   STRAIT R B,  BARNETT D J;  US7892511-B2 -- EP124226-A   IMPERIAL CHEM IND PLC (ICIL)   PINTO A,  TWIGG M V;  EP437059-A   IMPERIAL CHEM IND PLC (ICIL)   LYWOOD W J;  EP440258-A   HALDOR TOPSOE AS (TOPS)   NORSK J;  EP855366-A1   HALDOR TOPSOE AS (TOPS)   ROSTRUP-NIELSEN J,  CHRISTENSEN P S,  HANSEN V L;  US1931678-A   ;  US1938598-A   ;  US1972937-A   ;  US2046478-A   ;  US3094391-A   ;  US3716619-A   BETHLEHEM STEEL CORP (BETH); 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 US5545674-A   EXXON RES & ENG CO (ESSO)   ARCURI K B,  MAULDIN C H,  BEHRMANN W C;  US5570578-A   STEIN IND SA (STEN)   SAUJET J,  AMADIEU P,  HUBERT G,  HRISAFOVIC F,  MORIN J;  US5621155-A   RENTECH INC (RENT-Non-standard)   BENHAM C B,  BOHN M S,  YAKOBSON D L;  US5736116-A   KELLOGG CO M W (PULL)   LEBLANC J R,  KNEZ S A;  US5934943-A   CENTERPIN TECHNOLOGY INC (CENT-Non-standard)   MCCARTHY D C;  US5945459-A   EXXON RES & ENG CO (ESSO)   MAULDIN C H;  US5997834-A   HALDOR TOPSOE AS (TOPS)   UDENGAARD N,  SKAANDERUP-LARSEN J;  US6077459-A   HALDOR TOPSOE AS (TOPS)   LAURSEN C L,  STAHL H O;  US6087405-A   EXXON RES & ENG CO (ESSO)   PLECHA S,  MAULDIN C H,  PEDRICK L E;  US6103143-A   AIR PROD & CHEM INC (AIRP)   SIRCAR S,  HUFTON J R,  NATARAJ S;  US6117814-A   EXXON RES & ENG CO (ESSO)   PLECHA S,  MAULDIN C H,  PEDRICK L E;  US6124367-A   EXXON RES & ENG CO (ESSO)   PLECHA S,  MAULDIN C H,  PEDRICK L E;  US6136868-A   EXXON RES & ENG CO (ESSO)   CULROSS C C,  MAULDIN C H;  US20020031455-A1   ; 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