(19)

(11)

EP 0 753 150 A1

(12)

(43) Date of publication: 15.01.1997 Bulletin 1997/03 (21) Application number: 95913245.0 (22) Date of filing: 29.03.1995

(51) International Patent Classification (IPC):  G01N 33/ 52( . ) G01N 33/ 569( . ) G01N 33/ 543( . ) (86) International application number: PCT/GB1995/000713 (87) International publication number: WO 1995/026504 (05.10.1995 Gazette 1995/42)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 29.03.1994 GB 19940006209 (71) Applicant: CORTECS LIMITED Isleworth Middlesex TW7 6RL (GB)	(72) Inventor: GOODWIN, Philip, Robert Chester CH4 7PL (GB) (74) Representative: Chapman, Paul William, et al  Kilburn & Strode, 30 John Street London WC1N 2DD London WC1N 2DD (GB)