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(11)

EP 4 540 020 A1

(12)

(43) Date of publication: 23.04.2025 Bulletin 2025/17 (21) Application number: 23734010.4 (22) Date of filing: 14.06.2023

(51) International Patent Classification (IPC):  B24B 57/02(2006.01) B24B 29/00(2006.01) B24B 41/06(2012.01) B24B 37/10(2012.01) B24B 49/10(2006.01) B24B 37/34(2012.01) B24B 37/30(2012.01) (52) Cooperative Patent Classification (CPC): B24B 57/02; B24B 49/10; B24B 37/34; B24B 41/061; B24B 37/30; B24B 37/105 (86) International application number: PCT/FI2023/050352 (87) International publication number: WO 2023/242481 (21.12.2023 Gazette 2023/51)

(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: KH MA MD TN (30) Priority: 15.06.2022 FI 20225535 (71) Applicant: Turun yliopisto 20014 Turun yliopisto (FI)	(72) Inventors: PELTOLA, Arto 21420 Lieto (FI) PELTOLA, Tatu 21420 Lieto (FI) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)