(19)

(11)

EP 4 157 363 A1

(12)

(43) Date of publication: 05.04.2023 Bulletin 2023/14 (21) Application number: 21817692.3 (22) Date of filing: 27.05.2021

(51) International Patent Classification (IPC):  A61L 2/10(2006.01) A47F 9/04(2006.01) (52) Cooperative Patent Classification (CPC): A61L 2/10; A47F 2009/041; A61L 2202/16; A61L 2202/14 (86) International application number: PCT/SE2021/050496 (87) International publication number: WO 2021/246934 (09.12.2021 Gazette 2021/49)

(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: 02.06.2020 SE 2050632 (71) Applicant: Whitebox AB 931 33 Skellefteå (SE)	(72) Inventor: WIKSTRÖM, Erik 931 33 Skellefteå (SE) (74) Representative: Zacco Sweden AB  P.O. Box 5581 Löjtnantsgatan 21 114 85 Stockholm 114 85 Stockholm (SE)