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EP 4 267 530 A1

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(43) Date of publication: 01.11.2023 Bulletin 2023/44 (21) Application number: 21844053.5 (22) Date of filing: 20.12.2021

(51) International Patent Classification (IPC):  C04B 33/34(2006.01) C04B 41/45(2006.01) C04B 41/87(2006.01) B28B 11/00(2006.01) C04B 111/82(2006.01) C04B 41/00(2006.01) C04B 41/86(2006.01) B44C 1/16(2006.01) B41M 5/26(2006.01) (52) Cooperative Patent Classification (CPC): C04B 41/4529; C04B 41/009; C04B 2111/82; C04B 41/86; C04B 41/87; C04B 33/34; B28B 11/001; B28B 11/04; B44C 5/04; G03G 15/34; G03G 13/14   C-Sets: C04B 41/009, C04B 33/00; C04B 41/4529, C04B 41/0036, C04B 41/4511, C04B 41/4572, C04B 41/4578, C04B 41/5022; C04B 41/4529, C04B 41/0036, C04B 41/4511, C04B 41/4572, C04B 41/4578, C04B 41/5027, C04B 2103/54; (86) International application number: PCT/IB2021/062016 (87) International publication number: WO 2022/137075 (30.06.2022 Gazette 2022/26)

(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: 23.12.2020 IT 202000032138 (71) Applicant: Graf Industries S.p.A. 41015 Nonantola (MO) (IT)	(72) Inventor: VACCARI, Andrea 41015 Nonantola (MO) (IT) (74) Representative: Luppi, Emanuele  Brunacci & Partners S.r.l. Via Pietro Giardini, 625 41125 Modena (MO) 41125 Modena (MO) (IT)