(19)

(11)

EP 0 231 193 A1

(12)

(43) Date of publication: 12.08.1987 Bulletin 1987/33 (21) Application number: 85905851.0 (22) Date of filing: 07.11.1985

(51) International Patent Classification (IPC):  C12M 1/ 40( . ) C12M 3/ 00( . ) C12M 1/ 12( . ) C12N 11/ 00( . ) (86) International application number: PCT/GB1985/000508 (87) International publication number: WO 1986/002944 (22.05.1986 Gazette 1986/11)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 07.11.1984 GB 19840028085 (71) Applicant: Albright & Wilson Limited Oldbury Warley West Midlands, B68 ONN (GB)	(72) Inventors: MAVITUNA, Ferda 15 Bodmin Drive Cheshire SK7 2HX (GB) Park, Jong Moon Manchester M30 0JP (GB) (74) Representative: Atkinson, Peter Birch  Marks & Clerk Suite 301 Sunlight House Quay Street Manchester M3 3JY Manchester M3 3JY (GB)