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(11)

EP 4 355 530 A1

(12)

(43) Date of publication: 24.04.2024 Bulletin 2024/17 (21) Application number: 22740486.0 (22) Date of filing: 10.06.2022

(51) International Patent Classification (IPC):  B24D 3/00(2006.01) B24D 3/28(2006.01) (52) Cooperative Patent Classification (CPC): B24D 3/001; B24D 3/007; B24D 3/28 (86) International application number: PCT/IB2022/055423 (87) International publication number: WO 2022/263986 (22.12.2022 Gazette 2022/51)

(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 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: 15.06.2021 US 202163210798 P (71) Applicant: 3M Innovative Properties Company Saint Paul, Minnesota 55133-3427 (US)	(72) Inventor: HILL, Philip S. Bracknell, Berkshire RG12 8HT (GB) (74) Representative: Vossius & Partner Patentanwälte Rechtsanwälte mbB  Siebertstraße 3 81675 München 81675 München (DE)