(19)

(11)

EP 4 426 139 A1

(12)

(43) Date of publication: 11.09.2024 Bulletin 2024/37 (21) Application number: 21794448.7 (22) Date of filing: 02.11.2021

(51) International Patent Classification (IPC):  A24F 40/40(2020.01) (52) Cooperative Patent Classification (CPC): A24F 40/40 (86) International application number: PCT/CN2021/128146 (87) International publication number: WO 2023/077261 (11.05.2023 Gazette 2023/19)

(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) Applicant: Philip Morris Products S.A. 2000 Neuchâtel (CH)	(72) Inventor: LIU, Liu Huizhou, Guangdong 516006 (CN) (74) Representative: Reddie & Grose LLP  The White Chapel Building 10 Whitechapel High Street London E1 8QS London E1 8QS (GB)