(19)

(11)

EP 0 533 776 A1

(12)

(43) Date of publication: 31.03.1993 Bulletin 1993/13 (21) Application number: 91911159.0 (22) Date of filing: 11.06.1991

(51) International Patent Classification (IPC):  A61K 8/ 11( . ) A61K 9/ 48( . ) A61K 8/ 81( . ) A61Q 19/ 10( . ) (86) International application number: PCT/GB1991/000930 (87) International publication number: WO 1991/019487 (26.12.1991 Gazette 1991/29)

(84) Designated Contracting States: BE DE FR GB IT NL (30) Priority: 14.06.1990 GB 19900013307 (71) Applicant: ALLIED COLLOIDS LIMITED Bradford, West Yorkshire BD12 0JZ (GB)	(72) Inventors: FARRAR, David Bradford West Yorkshire BD14 6NH (GB) HAWE, Malcolm Huddersfield West Yorkshire HD3 4BS (GB) DOUGAL, Joyce, Collin Selby North Yorkshire YO8 9PP (GB) (74) Representative: Lawrence, Peter Robin Broughton  GILL JENNINGS & EVERY, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)