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(11)

EP 4 051 445 A1

(12)

(43) Date of publication: 07.09.2022 Bulletin 2022/36 (21) Application number: 20803895.0 (22) Date of filing: 30.10.2020

(51) International Patent Classification (IPC):  B22F 3/105(2006.01) B33Y 30/00(2015.01) B33Y 10/00(2015.01) B33Y 40/20(2020.01) (52) Cooperative Patent Classification (CPC): B33Y 10/00; B33Y 30/00; B33Y 40/20; B22F 10/10; B22F 10/20; B22F 10/28; B22F 2202/01; B22F 2999/00; B22F 12/30; Y02P 10/25   C-Sets: B22F 2999/00, B22F 12/30, B22F 2202/01; B22F 2999/00, B22F 10/28, B22F 12/30, B22F 2202/01; (86) International application number: PCT/FI2020/050714 (87) International publication number: WO 2021/084162 (06.05.2021 Gazette 2021/18)

(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 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: 30.10.2019 FI 20195928 (71) Applicant: Teknologian Tutkimuskeskus VTT Oy 02150 Espoo (FI)	(72) Inventor: ANTIKAINEN, Atte 02044 VTT (FI) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)