(19)

(11)

EP 0 909 381 A1

(12)

(43) Date of publication: 21.04.1999 Bulletin 1999/16 (21) Application number: 98918199.0 (22) Date of filing: 14.04.1998

(51) International Patent Classification (IPC):  G01N 21/ 25( . ) G01N 21/ 76( . ) (86) International application number: PCT/US1998/007505 (87) International publication number: WO 1998/046981 (22.10.1998 Gazette 1998/42)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 14.04.1997 US 19970840553 (71) Applicant: LJL Biosystems Sunnyvale, CA 94089 (US)	(72) Inventor: LEYTES, Lev, J. Palo Alto, CA 94301 (US) (74) Representative: Coyle, Philip Aidan, et al  F. R. KELLY & CO. 27 Clyde Road Ballsbridge Dublin 4 Dublin 4 (IE)