(19)

(11)

EP 4 680 916 A1

(12)

(43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 23720716.2 (22) Date of filing: 16.03.2023

(51) International Patent Classification (IPC):  F42B 6/00(2006.01) (52) Cooperative Patent Classification (CPC): F42B 6/003 (86) International application number: PCT/CN2023/081864 (87) International publication number: WO 2024/187449 (19.09.2024 Gazette 2024/38)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (71) Applicant: Gravity Brands Limited Harlow, Essex CM19 5TB (GB)	(72) Inventors: JU, Erlin Shanghai 201100 (CN) YANG, Yukun Hangzhou Bay New District Ningbo, Zhejiang 315336 (CN) (74) Representative: Dehns  10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)