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(11)

EP 4 770 816 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24802325.1 (22) Date of filing: 23.10.2024

(51) International Patent Classification (IPC):  B22F 5/10(2006.01) D04H 13/00(2006.01) B22F 10/28(2021.01) B33Y 80/00(2015.01) B22F 3/11(2006.01) (52) Cooperative Patent Classification (CPC): B33Y 80/00; B22F 3/1115; B22F 5/10; B22F 10/28 (86) International application number: PCT/IB2024/060414 (87) International publication number: WO 2025/088510 (01.05.2025 Gazette 2025/18)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 24.10.2023 IT 202300022182 (71) Applicant: Politecnico di Milano 20133 Milano (IT)	(72) Inventors: MARTULLI, Luca Michele 20133 Milano (IT) ROSSONI, Marco 20133 Milano (IT) PARENTI, Paolo 20133 MILANO (IT) PATRIARCA, Luca 20133 Milano (IT) MARIOTTI, Luca 20133 Milano (IT) (74) Representative: Metroconsult Srl  Foro Bonaparte 51 20121 Milano 20121 Milano (IT)