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EP 4 284 765 A1

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(43) Date of publication: 06.12.2023 Bulletin 2023/49 (21) Application number: 22704579.6 (22) Date of filing: 26.01.2022

(51) International Patent Classification (IPC):  C04B 28/02(2006.01) C04B 28/06(2006.01) C04B 111/60(2006.01) C04B 26/14(2006.01) C04B 26/02(2006.01) C04B 28/00(2006.01) (52) Cooperative Patent Classification (CPC): C04B 2111/60; C04B 28/02; C04B 26/02; C04B 28/006; C04B 28/065; C04B 26/14; C04B 2201/20; C04B 2111/0031   C-Sets: C04B 26/14, C04B 14/306, C04B 14/368; C04B 28/02, C04B 14/04, C04B 14/046, C04B 14/048, C04B 14/06, C04B 14/22, C04B 14/28, C04B 14/303, C04B 14/305, C04B 14/306, C04B 14/307, C04B 14/308, C04B 14/368, C04B 2103/32, C04B 2103/54; C04B 26/02, C04B 14/04, C04B 14/046, C04B 14/048, C04B 14/06, C04B 14/22, C04B 14/28, C04B 14/303, C04B 14/305, C04B 14/306, C04B 14/307, C04B 14/308, C04B 14/368, C04B 2103/32, C04B 2103/54; C04B 28/006, C04B 14/04, C04B 14/046, C04B 14/048, C04B 14/06, C04B 14/22, C04B 14/28, C04B 14/303, C04B 14/305, C04B 14/306, C04B 14/307, C04B 14/308, C04B 14/368, C04B 2103/32, C04B 2103/54; C04B 28/065, C04B 7/02, C04B 14/306, C04B 14/368, C04B 18/146; (86) International application number: PCT/IB2022/050671 (87) International publication number: WO 2022/162548 (04.08.2022 Gazette 2022/31)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 27.01.2021 IT 202100001646 (71) Applicant: Ferrari Granulati S.r.l. 37023 Grezzana (VR) (IT)	(72) Inventor: FERRARI, Alberto 37023 Grezzana (VR) (IT) (74) Representative: Marchi, Paolo et al Ruffini Ponchiroli e Associati S.r.l. Via Caprera, 6 37126 Verona 37126 Verona (IT)