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EP 3 917 370 A1

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(43) Date of publication: 08.12.2021 Bulletin 2021/49 (21) Application number: 20706365.2 (22) Date of filing: 28.01.2020

(51) International Patent Classification (IPC):  A47L 13/16(2006.01) A47L 13/34(2006.01) A47L 13/10(2006.01) (52) Cooperative Patent Classification (CPC): A47L 13/10; A47L 13/34; A47L 13/16 (86) International application number: PCT/IB2020/050661 (87) International publication number: WO 2020/157659 (06.08.2020 Gazette 2020/32)

(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: 29.01.2019 US 201962798014 P (71) Applicant: 3M Innovative Properties Company Saint Paul, Minnesota 55133-3427 (US)

(72) Inventors: TRUONG, Myhanh T. Saint Paul, Minnesota 55133-3427 (US) TUMAN, Scott J. Saint Paul, Minnesota 55133-3427 (US) SCHMALL, Kaylee R. Saint Paul, Minnesota 55133-3427 (US) TOUPAL, Alexander S. Saint Paul, Minnesota 55133-3427 (US) KADOMA, Ignatius A. Saint Paul, Minnesota 55133-3427 (US) (74) Representative: Vossius & Partner Patentanwälte Rechtsanwälte mbB  Siebertstraße 4 81675 München 81675 München (DE)