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EP 4 312 701 A1

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(43) Date of publication: 07.02.2024 Bulletin 2024/06 (21) Application number: 21718806.9 (22) Date of filing: 26.03.2021

(51) International Patent Classification (IPC):  A47L 13/256(2006.01) G01C 22/00(2006.01) A47L 13/20(2006.01) G01P 13/00(2006.01) (52) Cooperative Patent Classification (CPC): A47L 13/256; A47L 13/20 (86) International application number: PCT/EP2021/057984 (87) International publication number: WO 2022/199848 (29.09.2022 Gazette 2022/39)

(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 (71) Applicants: Carl Freudenberg KG 69469 Weinheim (DE) Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. 80686 München (DE)	(72) Inventors: BLOCH, Oliver 68259 Mannheim (DE) LANGEJÜRGEN, Jens 68167 Mannheim (DE) RINGKAMP, Jan 68167 Mannheim (DE) RADLER, Philipp 68167 Mannheim (DE) (74) Representative: Reiser & Partner Patentanwälte mbB  Weinheimer Straße 102 69469 Weinheim 69469 Weinheim (DE)