(19)

(11)

EP 4 096 867 A1

(12)

(43) Date of publication: 07.12.2022 Bulletin 2022/49 (21) Application number: 21702111.2 (22) Date of filing: 25.01.2021

(51) International Patent Classification (IPC):  B24D 11/00(2006.01) B24D 18/00(2006.01) (52) Cooperative Patent Classification (CPC): B24D 18/0072; B24D 11/001 (86) International application number: PCT/IB2021/050541 (87) International publication number: WO 2021/152444 (05.08.2021 Gazette 2021/31)

(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: 31.01.2020 US 202062968346 P (71) Applicant: 3M Innovative Properties Company Saint Paul, Minnesota 55133-3427 (US)

(72) Inventors: LENTZ, Daniel M. Saint Paul, Minnesota 55133-3427 (US) WILSON, Geoffrey I. Saint Paul, Minnesota 55133-3427 (US) NELSON, Thomas J. Saint Paul, Minnesota 55133-3427 (US) RUSTAD, Blake R. Saint Paul, Minnesota 55133-3427 (US) LI, Junting Saint Paul, Minnesota 55133-3427 (US) MAHER, William S. Saint Paul, Minnesota 55133-3427 (US) MUELLER, Gregory S. Saint Paul, Minnesota 55133-3427 (US) (74) Representative: De Clercq & Partners  Edgard Gevaertdreef 10a 9830 Sint-Martens-Latem 9830 Sint-Martens-Latem (BE)