(19)

(11)

EP 1 141 420 A1

(12)

(43) Date of publication: 10.10.2001 Bulletin 2001/41 (21) Application number: 00969546.1 (22) Date of filing: 25.10.2000

(51) International Patent Classification (IPC)7: C14B 3/00, C14B 1/42, C14C 15/00 (86) International application number: PCT/EP0010/491 (87) International publication number: WO 0132/937 (10.05.2001 Gazette 2001/19)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 29.10.1999 IT PI990068 (71) Applicant: Italprogetti Engineering S.R.L. San Romano,56020 Montopoli V.A. (IT)	(72) Inventor: SERRINI, Mario I-56024 San Miniato (IT) (74) Representative: Gritschneder, Martin, Dipl.-Phys. et al Patentanwälte Abitz & PartnerPostfach 86 01 09 81628 München 81628 München (DE)