(19)

(11)

EP 1 157 134 A1

(12)

(43) Date of publication: 28.11.2001 Bulletin 2001/48 (21) Application number: 99963678.0 (22) Date of filing: 29.12.1999

(51) International Patent Classification (IPC)7: C14C 15/00 (86) International application number: PCT/IT9900/426 (87) International publication number: WO 0040/761 (13.07.2000 Gazette 2000/28)

(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: 30.12.1998 IT PI980085 (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)