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EP 4 337 033 A1

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(43) Date of publication: 20.03.2024 Bulletin 2024/12 (21) Application number: 22807889.5 (22) Date of filing: 13.05.2022

(51) International Patent Classification (IPC):  A24C 5/18(2006.01) A24D 1/20(2020.01) A24D 3/02(2006.01) A24D 3/16(2006.01) A24F 40/46(2020.01) A24D 1/04(2006.01) A24D 1/02(2006.01) A24D 3/10(2006.01) A24D 3/04(2006.01) (52) Cooperative Patent Classification (CPC): A24D 1/20; A24D 3/10; A24D 3/163; A24D 3/061 (86) International application number: PCT/KR2022/006904 (87) International publication number: WO 2022/240242 (17.11.2022 Gazette 2022/46)

(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: 14.05.2021 KR 20210063011 (71) Applicant: KT & G Corporation Daejeon 34337 (KR)	(72) Inventors: JANG, Seok Su Daejeon 34337 (KR) HAN, Dae Nam Seoul 06344 (KR) KIM, Dong Sung Seoul 06310 (KR) KIM, Yong Hwan Anyang-si Gyeonggi-do 13970 (KR) LEE, Seung Won Gwangmyeong-si Gyeonggi-do 14293 (KR) (74) Representative: Ter Meer Steinmeister & Partner  Patentanwälte mbB Nymphenburger Straße 4 80335 München 80335 München (DE)