US6005149-A -- DE2748785-A   ;  US1270949-A   ;  US1677758-A   ;  US2805188-A   ;  US3639111-A   REGENTS OF THE UNIVERSITY (REGC);  US3759677-A   CHEVRON RES CO (CALI);  US3842762-A   ;  US3874116-A   CHEVRON RES CO (CALI)   WHITE R J;  US3938449-A   ;  US3990865-A   ALLIS-CHALMERS CORP (ALCM)   CYBRIWSKY A,  PETERSEN G T;  US4063903-A   COMBUSTION EQUIP (COMB-Non-standard);  US4178266-A   ;  US4308103-A   ENERGY RECOVERY RES (ENER-Non-standard)   ROTTER F;  US4318713-A   ALLIS-CHALMERS CORP (ALCM)   LEE G T,  LEES J N,  PUKITA P M;  US4361100-A   WERNER & PFLEIDERER (WERN)   HINGER K J;  US4441892-A   CARBON GAS TECH GMBH (CARB-Non-standard)   SCHUSTER E;  US4591362-A   PHILLIPS PETROLEUM CO (PHIP)   YUDOVICH A,  HAYS G E;  US4758268-A   ZIA TECH INC (ZIAT-Non-standard)   BISHOP N G,  BOTTINELLI N E,  KOTRABA N L;  US4840129-A   KRAFTWERK UNION AG (KRUN);  KWU-UMWELTTECH GMBH (KRUN)   JELINEK H;  US4963182-A   ;  US4976210-A   DEWALD J J (DEWA-Individual)   DEWALD J J;  US4983214-A   ZIA TECHNOLOGY INC (ZIAT-Non-standard);  GEA TECHNOLOGY INC (GEAT-Non-standard)   BOTTINELLI N E,  KOTRABA N L,  BISHOP N G;  US5028304-A   BELORUSSIAN POLY (BEPO);  STANISHEVSKY V K (STAN-Individual)   STANISHEVS V K,  PARSHUTO A E,  KOSOBUTSKY A A,  SEMENENKO L M,  TIKHONOVSK V N,  KHLEBTSERV V A,  VELICHKO L S,  SEMCHENKO A A;  US5425792-A   PROLER ENVIRONMENTAL SERVICES INC (PROL-Non-standard);  HYLSA SA (HYLS-Non-standard)   BISHOP N G,  VIRAMONTES-BROWN R;  US5584255-A   PROLER ENVIRONMENTAL SERVICES INC (PROL-Non-standard);  HYLSA SA DE CV (HYLS-Non-standard)   BISHOP N G,  TAYLOR D G;  US5656044-A   HYLSA SA DE CV (HYLS-Non-standard);  PROLER ENVIRONMENTAL SERVICES INC (PROL-Non-standard)   BISHOP N G,  VIRAMONTES-BROWN R;  US5851246-A   HYLSA SA DE CV (HYLS-Non-standard);  PROLER ENVIRONMENTAL SERVICES INC (PROL-Non-standard)   BISHOP N G,  VIRAMONTES-BROWN R;  WO200011114-A1 -- EP442040-A   ZIA TECHNOLOGY INC (ZIAT-Non-standard);  GEA TECHNOLOGY INC (GEAT-Non-standard)   BOTTINELLI N E,  KOTRABA N L,  BISHOP N G;  EP568997-A1   PROLER ENVIRONMENTAL SERVICES INC (PROL-Non-standard);  HYLSA SA (HYLS-Non-standard)   BISHOP N G,  VIRAMONTES-BROWN R;  EP765928-A2   ;  EP442040-A3   ZIA TECHNOLOGY INC (ZIAT-Non-standard);  GEA TECHNOLOGY INC (GEAT-Non-standard)   BOTTINELLI N E,  KOTRABA N L,  BISHOP N G;  US4597772-A   WRIGHT-MALTA CORP (WRIG-Non-standard)   COFFMAN J A