(19)

(11)

EP 0 424 400 A1

(12)

(43) Date of publication: 02.05.1991 Bulletin 1991/18 (21) Application number: 89905442.0 (22) Date of filing: 05.05.1989

(51) International Patent Classification (IPC):  C22B 7/ 00( . ) (86) International application number: PCT/GB1989/000486 (87) International publication number: WO 1989/011550 (30.11.1989 Gazette 1989/28)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 25.05.1988 GB 19880012422 (71) Applicant: KARP, Stefan Luton, Bedfordshire LU3 2HZ (GB)	(72) Inventor: KARP, Stefan Luton, Bedfordshire LU3 2HZ (GB)