(19)

(11)

EP 1 056 977 A1

(12)

(43) Date of publication: 06.12.2000 Bulletin 2000/49 (21) Application number: 99907997.3 (22) Date of filing: 18.02.1999

(51) International Patent Classification (IPC)7: F24F 6/04 (86) International application number: PCT/SE9900/218 (87) International publication number: WO 9942/764 (26.08.1999 Gazette 1999/34)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 20.02.1998 SE 9800537 (71) Applicant: KB Biotopen 436 38 Askim (SE)	(72) Inventor: LÖFQVIST, Gunnar S-429 42 Särö (SE) (74) Representative: Cederbom, Hans Erik August et al Cegumark AB,Box 53047 400 14 Göteborg 400 14 Göteborg (SE)