(19)

(11)

EP 0 357 682 A1

(12)

(43) Date of publication: 14.03.1990 Bulletin 1990/11 (21) Application number: 88906157.0 (22) Date of filing: 10.06.1988

(51) International Patent Classification (IPC):  C14C 1/ 08( . ) (86) International application number: PCT/SE1988/000313 (87) International publication number: WO 1988/010317 (29.12.1988 Gazette 1988/28)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 16.06.1987 SE 19870002522 (71) Applicant: AGA AKTIEBOLAG S-181 81 Lidingö (SE)	(72) Inventor: TUOHIMAA, Timo SF-00100 Helsingfors (FI) (74) Representative: Wiedemann, Bernd, et al  AGA AKTIEBOLAG Patent Department S-181 81 Lidingö S-181 81 Lidingö (SE)