(19)

(11)

EP 1 861 592 A1

(12)

(43) Date of publication: 05.12.2007 Bulletin 2007/49 (21) Application number: 06701623.8 (22) Date of filing: 12.01.2006

(51) International Patent Classification (IPC):  F01N 1/24(2006.01) F01N 7/18(2006.01) F01N 7/16(2006.01) F01N 1/10(2006.01) (86) International application number: PCT/IT2006/000013 (87) International publication number: WO 2006/095373 (14.09.2006 Gazette 2006/37)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 10.03.2005 IT RM20050107 (71) Applicant: Vale S.R.L. 81030 Lusciano (IT)	(72) Inventor: PIANESE, Luigi I-81030 Lusciano (IT) (74) Representative: Fiammenghi, Carlo  c/o Fiammenghi-Fiammenghi Via Quattro Fontane, No. 31 00184 Roma 00184 Roma (IT)