(19)

(11)

EP 0 028 649 A1

(12)

(43) Date of publication: 20.05.1981 Bulletin 1981/20 (21) Application number: 80901201.0 (22) Date of filing: 16.05.1980

(51) International Patent Classification (IPC):  B01J 2/ 28( . ) C22B 1/ 243( . ) B01J 37/ 00( . ) (86) International application number: PCT/SE1980/000144 (87) International publication number: WO 1980/002566 (27.11.1980 Gazette 1980/27)

(84) Designated Contracting States: AT CH DE FR GB LI NL (30) Priority: 16.05.1979 SE 19790004325 07.05.1980 SE 19800003436 07.05.1980 SE 19800003437 (71) Applicant: ROOS, Lars-Erik S-740 70 Östhammar (SE)	(72) Inventor: ROOS, Lars-Erik S-740 70 Östhammar (SE) (74) Representative: Wibom, Hans Sven Erik  Dr. Ludwig Brann Patentbyra AB P.O. Box 17192 S-104 62 Stockholm S-104 62 Stockholm (SE)