(19)

(11)

EP 0 411 068 A1

(12)

(43) Date of publication: 06.02.1991 Bulletin 1991/06 (21) Application number: 89912927.0 (22) Date of filing: 07.11.1989

(51) International Patent Classification (IPC):  G01N 35/ 02( . ) G01N 21/ 27( . ) G05D 21/ 02( . ) C12M 1/ 34( . ) G01N 35/ 00( . ) (86) International application number: PCT/US1989/004981 (87) International publication number: WO 1990/005293 (17.05.1990 Gazette 1990/11)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 08.11.1988 US 19880269051 (71) Applicant: APPLIED BIOSYSTEMS, INC. Foster City California 94404 (US)	(72) Inventor: MICHEL, Bruno CH-8136 Gattikon (CH) (74) Representative: West, Alan Harry, et al  R.G.C. Jenkins & Co. 26 Caxton Street London SW1H 0RJ London SW1H 0RJ (GB)