(19)

(11)

EP 0 143 796 A1

(12)

(43) Date of publication: 12.06.1985 Bulletin 1985/24 (21) Application number: 84901351.0 (22) Date of filing: 29.03.1984

(51) International Patent Classification (IPC):  B01L 3/ 02( . ) (86) International application number: PCT/FI1984/000028 (87) International publication number: WO 1984/004056 (25.10.1984 Gazette 1984/25)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 13.04.1983 FI 19830001239 (71) Applicant: LABSYSTEMS OY SF-00810 Helsinki 81 (FI)	(72) Inventors: FAGERSTEDT, Mikael SF-00800 Helsinki 80 (FI) KASKI, Erkki SF-00820 Helsinki 82 (FI) TERVAMÄKI, Jukka SF-00650 Helsinki 65 (FI) (74) Representative: Tillbrook, Christopher John  c/o Reginald W. Barker & Co., Chancery House, 53-64, Chancery Lane London, WC2A 1QU London, WC2A 1QU (GB)