(19)

(11)

EP 0 512 024 A1

(12)

(43) Date of publication: 11.11.1992 Bulletin 1992/46 (21) Application number: 91903533.0 (22) Date of filing: 15.01.1991

(51) International Patent Classification (IPC):  A61K 31/ 16( . ) A61P 9/ 12( . ) A61K 31/ 165( . ) A61P 25/ 02( . ) (86) International application number: PCT/SE1991/000023 (87) International publication number: WO 1991/010428 (25.07.1991 Gazette 1991/17)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 22.01.1990 SE 19900000207 (71) Applicant: Nobel Chemicals AB S-691 85 Karlskoga (SE)	(72) Inventor: WESTFELT, Lars S-691 44 Karlskoga (SE) (74) Representative: Schöld, Zaid  Eka Nobel AB Patent Department Box 11556 S-100 61 Stockholm S-100 61 Stockholm (SE)