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(11)

EP 1 328 712 A1

(12)

(43) Date of publication: 23.07.2003 Bulletin 2003/30 (21) Application number: 01977049.4 (22) Date of filing: 25.10.2001

(51) International Patent Classification (IPC)7: F01N 7/08, F01N 3/28, F01N 3/24, B01J 35/04 (86) International application number: PCT/SE0102/337 (87) International publication number: WO 0204/0839 (23.05.2002 Gazette 2002/21)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 27.10.2000 SE 0003928 (71) Applicant: SANDVIK AKTIEBOLAG 811 81 Sandviken (SE)	(72) Inventors: LEWIN, Thomas S-734 40 HALLSTAHAMMAR (SE) LÖVGREN, Hans S-734 36 HALLSTAHAMMAR (SE) (74) Representative: Örtenblad, Bertil Tore et al Noréns Patentbyra ABP.O. Box 10198 100 55 Stockholm 100 55 Stockholm (SE)