(19)

(11)

EP 0 682 694 A1

(12)

(43) Date of publication: 22.11.1995 Bulletin 1995/47 (21) Application number: 94905801.0 (22) Date of filing: 07.02.1994

(51) International Patent Classification (IPC):  A01N 37/ 16( . ) A61L 12/ 12( . ) C07C 409/ 24( . ) C07C 409/ 30( . ) C11D 3/ 39( . ) C11D 7/ 32( . ) C11D 7/ 54( . ) D21C 9/ 16( . ) A61L 2/ 18( . ) C07C 409/ 00( . ) C07C 409/ 26( . ) C07C 409/ 42( . ) C11D 7/ 26( . ) C11D 7/ 38( . ) D06L 3/ 02( . ) (86) International application number: PCT/GB1994/000228 (87) International publication number: WO 1994/018297 (18.08.1994 Gazette 1994/19)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 08.02.1993 GB 19930002441 (71) Applicant: WARWICK INTERNATIONAL GROUP LIMITED Leeds LS12 4JE (GB)	(72) Inventors: CROUD, Vincent Brian Holywell, Clwyd CH8 7HZ (GB) TOMPSETT, Stephen James Nr Rhyl, Clwyd (GB) (74) Representative: Jones, Helen Marjorie Meredith  Gill Jennings & Every, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)