(19)

(11)

EP 0 382 725 A1

(12)

(43) Date of publication: 22.08.1990 Bulletin 1990/34 (21) Application number: 88904874.0 (22) Date of filing: 11.05.1988

(51) International Patent Classification (IPC):  G01N 33/ 542( . ) G01N 33/ 573( . ) (86) International application number: PCT/US1988/001553 (87) International publication number: WO 1988/008984 (17.11.1988 Gazette 1988/25)

(84) Designated Contracting States: CH DE FR GB IT LI NL SE (30) Priority: 12.05.1987 US 19870048712 (71) Applicant: COULTER ELECTRONICS INC. Hialeah Florida 33010 (US)	(72) Inventors: LUCAS, Frank, J. Boca Raton, FL 33432 (US) HO, Show-jiuan Miami, FL 33157 (US) (74) Representative: Nettleton, John Victor, et al  Abel & Imray Northumberland House 303-306 High Holborn London, WC1V 7LH London, WC1V 7LH (GB)