(19)

(11)

EP 4 422 436 A1

(12)

(43) Date of publication: 04.09.2024 Bulletin 2024/36 (21) Application number: 21790061.2 (22) Date of filing: 25.10.2021

(51) International Patent Classification (IPC):  A24F 40/46(2020.01) A24F 40/51(2020.01) (52) Cooperative Patent Classification (CPC): A24F 40/51; A24F 40/46 (86) International application number: PCT/CN2021/126067 (87) International publication number: WO 2023/070259 (04.05.2023 Gazette 2023/18)

(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: ZHAN, Xin Hong Kong Science Park, Shatin, NT Hong Kong (CN) (74) Representative: Abitz & Partner  Postfach 86 01 09 81628 München 81628 München (DE)