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EP 4 121 581 A1

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(43) Date of publication: 25.01.2023 Bulletin 2023/04 (21) Application number: 21717527.2 (22) Date of filing: 18.03.2021

(51) International Patent Classification (IPC):  C23C 22/50(2006.01) C23G 1/00(2006.01) C23G 1/36(2006.01) C23C 22/86(2006.01) C23G 1/08(2006.01) (52) Cooperative Patent Classification (CPC): C23C 22/50; C23C 22/86; C23G 1/00; C23G 1/08; C23G 1/086; C23G 1/36 (86) International application number: PCT/IB2021/052258 (87) International publication number: WO 2021/186375 (23.09.2021 Gazette 2021/38)

(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: 19.03.2020 IT 202000005848 (71) Applicant: Tenova S.p.A. 20149 Milano (IT)	(72) Inventors: MARTINES, Stefano 16138 Genova (IT) ASTENGO, Giovanni 16156 Genova (IT) (74) Representative: Marturano, Pasqualino et al Barzanò & Zanardo Milano S.p.A. Via Borgonuovo, 10 20121 Milano 20121 Milano (IT)