(19)

(11)

EP 2 255 019 A2

(12)

(88) Date of publication A3: 22.10.2009 (43) Date of publication: 01.12.2010 Bulletin 2010/48 (21) Application number: 09715393.6 (22) Date of filing: 02.03.2009

(51) International Patent Classification (IPC):  C14B 3/00(2006.01) C14C 15/00(2006.01) (86) International application number: PCT/IT2009/000076 (87) International publication number: WO 2009/107163 (03.09.2009 Gazette 2009/36)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 29.02.2008 IT VI20080053 (71) Applicant: Erretre S.p.A. 36071 Arzignano (Vicenza) (IT)	(72) Inventor: GALIOTTO, Ruggero I-36071 Arzignano, Vicenza (IT) (74) Representative: Iannone, Carlo Luigi  Barzanò & Zanardo Roma S.p.A. Via Piemonte 26 00187 Roma 00187 Roma (IT)