(19)

(11)

EP 0 809 740 A1

(12)

(43) Date of publication: 03.12.1997 Bulletin 1997/49 (21) Application number: 96903276.0 (22) Date of filing: 14.02.1996

(51) International Patent Classification (IPC):  E04G 5/ 00( . ) E04G 21/ 32( . ) E04G 5/ 12( . ) (86) International application number: PCT/NO1996/000035 (87) International publication number: WO 1996/025571 (22.08.1996 Gazette 1996/38)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: LT LV SI (30) Priority: 14.02.1995 NO 19950000555 (71) Applicant: MILJOSTILLAS A/S 3661 Rjukan (NO)	(72) Inventors: LEKVEN, Nils, Christian N-5200 Os (NO) OLSEN, Terje N-5066 Hjellestad (NO) (74) Representative: Bleukx, Luc  Norsk Hydro Technology B.V., Avenue Marcel Thiry 83 1200 Brussels 1200 Brussels (BE)