US5766929-A -- US3634272-A   ;  US4297122-A   ;  US4385121-A   ;  US4877736-A   US DEPT ENERGY (USAT);  DU PONT DE NEMOURS & CO E I (DUPO)   FLIERMANS C B;  US4925802-A   ;  US5006250-A   UNIV LELAND STANFORD JUNIOR (STRD)   ROBERTS P V,  HOPKINS G D,  SEMPRINI L,  MCCARTY P L,  MACKAY D M;  US5024949-A   ;  US5071755-A   ;  US5196121-A   ABB ENVIRONMENTAL SERVICES INC (ALLM)   MOORE A T,  LEAHY M C,  FINDLAY M M,  FOGEL S;  US5200343-A   UNIV MICHIGAN STATE (UNMS)   COLE J R,  FATHEPURE B Z,  TIEDJE J M;  US5277815-A   CONOCO INC (CONO);  DU PONT DE NEMOURS & CO E I (DUPO)   BEEMAN R E;  US5279740-A   AMERICAN TELEPHONE & TELEGRAPH CO (AMTT)   AIKEN J W,  BASILE A J,  SMITH G J;  US5316940-A   UNIV TEXAS SYSTEM (TEXA)   SPEITEL G E,  PHELPS P,  GEORGIOU G;  US5340376-A   GRACE SIERRA HORTIC (GRAC-Non-standard)   CUNNINGHAM J;  US5593888-A   GLAZE B S (GLAZ-Individual);  WARNER K R (WARN-Individual);  HORN T D (HORN-Individual);  HORN R D (HORN-Individual)   GLAZE B S,  WARNER K R,  HORN T D,  HORN R D;  JP2803725-B2 -- US4297122-A   ;  US5006250-A   UNIV LELAND STANFORD JUNIOR (STRD)   ROBERTS P V,  HOPKINS G D,  SEMPRINI L,  MCCARTY P L,  MACKAY D M;  US5071755-A   ;  US5340376-A   GRACE SIERRA HORTIC (GRAC-Non-standard)   CUNNINGHAM J;  WO9966080-A1 -- US3634272-A   ;  US4297122-A   ;  US4385121-A   ;  US4877736-A   US DEPT ENERGY (USAT);  DU PONT DE NEMOURS & CO E I (DUPO)   FLIERMANS C B;  US4925802-A   ;  US5006250-A   UNIV LELAND STANFORD JUNIOR (STRD)   ROBERTS P V,  HOPKINS G D,  SEMPRINI L,  MCCARTY P L,  MACKAY D M;  US5024949-A   ;  US5071755-A   ;  US5196121-A   ABB ENVIRONMENTAL SERVICES INC (ALLM)   MOORE A T,  LEAHY M C,  FINDLAY M M,  FOGEL S;  US5200343-A   UNIV MICHIGAN STATE (UNMS)   COLE J R,  FATHEPURE B Z,  TIEDJE J M;  US5277815-A   CONOCO INC (CONO);  DU PONT DE NEMOURS & CO E I (DUPO)   BEEMAN R E;  US5279740-A   AMERICAN TELEPHONE & TELEGRAPH CO (AMTT)   AIKEN J W,  BASILE A J,  SMITH G J;  US5316940-A   UNIV TEXAS SYSTEM (TEXA)   SPEITEL G E,  PHELPS P,  GEORGIOU G;  US5340376-A   GRACE SIERRA HORTIC (GRAC-Non-standard)   CUNNINGHAM J;  US5593888-A   GLAZE B S (GLAZ-Individual);  WARNER K R (WARN-Individual);  HORN T D (HORN-Individual);  HORN R D (HORN-Individual)   GLAZE B S,  WARNER K R,  HORN T D,  HORN R D