(19)

(11)

EP 0 257 045 A1

(12)

(43) Date of publication: 02.03.1988 Bulletin 1988/09 (21) Application number: 87900913.0 (22) Date of filing: 20.01.1987

(51) International Patent Classification (IPC):  C12P 7/ 06( . ) (86) International application number: PCT/SE1987/000023 (87) International publication number: WO 1987/004465 (30.07.1987 Gazette 1987/17)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 21.01.1986 SE 19860000253 (71) Applicants: BJURENVALL, Ingemar Virginia Water Surrey (GB) CONRAD, Ernst S-370 24 Nättraby (SE)	(72) Inventors: BJURENVALL, Ingemar Virginia Water Surrey (GB) CONRAD, Ernst S-370 24 Nättraby (SE) (74) Representative: Inger, Lars Ulf Bosson  Boliden AB Patent & Trade Marks Box 5508 S-114 85 Stockholm S-114 85 Stockholm (SE)