(19)

(11)

EP 4 771 656 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24759247.0 (22) Date of filing: 29.07.2024

(51) International Patent Classification (IPC):  H01F 3/10(2006.01) H01F 30/10(2006.01) H02M 1/00(2006.01) H01F 27/38(2006.01) H01F 27/40(2006.01) H01F 37/00(2006.01) H01F 41/02(2006.01) (52) Cooperative Patent Classification (CPC): H02M 1/0064; H01F 27/40; H01F 30/10; H01F 37/00; H01F 3/10; H01F 27/38; H01F 41/024; H01F 41/0213 (86) International application number: PCT/IB2024/057318 (87) International publication number: WO 2025/046341 (06.03.2025 Gazette 2025/10)

(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: 29.08.2023 US 202363535126 P (71) Applicant: 3M Innovative Properties Company Saint Paul, Minnesota 55133-3427 (US)	(72) Inventors: KIM, Jinwook Seoul, Gyeonggi-do 150-705 (KR) WOO, Seong-Woo Seoul, Gyeonggi-do 150-705 (KR) MO, Sang-Jun Seoul, Gyeonggi-do 150-705 (KR) (74) Representative: Vossius & Partner Patentanwälte Rechtsanwälte mbB  Siebertstraße 4 81675 München 81675 München (DE)