WO9739984-A1 -- CH642563-A   ;  EP851843-A1   K-V ASSOC INC (KVAS-Non-standard)   KERFOOT W B;  GB2216113-A   ;  JP04126542-A   ;  JP57021995-A   HITACHI PLANT ENG & CONSTR CO (HIEJ)   MATSUZAKI H,  TAKAHASHI S;  US5205927-A   BATTELLE MEMORIAL INST (BATT)   WICKRAMANAYAKE G B;  US5384048-A   US DEPT ENERGY (USAT)   HAZEN T C,  FLIERMANS C B;  EP851843-A1 -- GB2185901-A   ;  JP03267196-A   ;  JP06023378-A   ;  US5167806-A   INT ENVIRONMENTAL SYSTEMS INC (ITEN-Non-standard)   WANG L K,  KURYLKO L,  WANG M H S;  US6306296-B1 -- GB2185901-A   ;  US4268283-A   W-K-M WELLHEAD SYST (WKMV-Non-standard)   ROBERTS A L;  US4360234-A   KENNECOTT COPPER CORP (KENC)   DAVIDSON D H,  HARD R A,  HSUEH L;  US4614596-A   ;  US4832122-A   US DEPT ENERGY (USAT)   COREY J C,  LOONEY B B,  KABACK D S;  US4844795-A   HALWANI B (HALW-Individual)   HALWANI B;  US4941957-A   ULTROX INT (ULTR-Non-standard)   ZEFF J D,  LEITIS E;  US5080805-A   HOUSER S (HOUS-Individual)   HOUSER S;  US5120442-A   THOMAE GMBH KARL (THOM)   KULL A,  MATHER M,  SCHMEISS H J;  US5167806-A   INT ENVIRONMENTAL SYSTEMS INC (ITEN-Non-standard)   WANG L K,  KURYLKO L,  WANG M H S;  US5205927-A   BATTELLE MEMORIAL INST (BATT)   WICKRAMANAYAKE G B;  US5221159-A   ENVIRONMENTAL IMPROVEMENT TECHNOLOGIES (ENVI-Non-standard)   BILLINGS J F,  BILLINGS G K;  US5248395-A   UOP (UNVO)   RASTELLI H,  PAI J L,  KJELLSON C J;  US5362400-A   PAREF AB (PARE-Non-standard)   MARTINELL R H;  US5375539-A   ;  US5389267-A   UNIV LELAND STANFORD JUNIOR (STRD)   GORELICK S M,  GVIRTZMAN H;  US5398757-A   KN ENERGY INC (KNEN-Non-standard)   BROWN A,  CORTE L J;  US5402848-A   KELLY L G (KELL-Individual)   KELLY L G;  US5403476-A   IEG IND ENG GMBH (IEGI-Non-standard)   BERNHARDT B;  US5425598-A   PENNINGTON L H (PENN-Individual)   PENNINGTON L H;  US5427693-A   O-THREE LTD (OTHR-Non-standard)   MCEACHERN D H,  MAUSGROVER R H;  US5472294-A   ENVIRONMENTAL IMPROVEMENT TECHNOLOGIES (ENVI-Non-standard)   BILLINGS J F,  BILLINGS G K;  US5588490-A   ;  US5620593-A   STAGNER J C (STAG-Individual)   STAGNER J C;  US5664628-A   PALL CORP (PALL)   KOEHLER P C,  GEIBEL S A,  WHITLOCK M B,  HASHEMI R,  MALBREL C A;  US5676823-A   BAKER HUGHES INC (BAKO)   MCKAY J D,  YNCHAUSTI R D,  KEYSER P M;  US5698092-A   ;  EP851843-B1 -- CH642563-A   ;  GB2185901-A   ;  GB2216113-A   ;  JP03267196-A   ;  JP04126542-A   ;  JP06023378-A   ;  JP57021995-A   HITACHI PLANT ENG & CONSTR CO (HIEJ)   MATSUZAKI H,  TAKAHASHI S;  US5167806-A   INT ENVIRONMENTAL SYSTEMS INC (ITEN-Non-standard)   WANG L K,  KURYLKO L,  WANG M H S;  US5205927-A   BATTELLE MEMORIAL INST (BATT)   WICKRAMANAYAKE G B;  US5384048-A   US DEPT ENERGY (USAT)   HAZEN T C,  FLIERMANS C B