(19)

(11)

EP 4 136 056 A2

(12)

(88) Date of publication A3: 16.06.2022 (43) Date of publication: 22.02.2023 Bulletin 2023/08 (21) Application number: 21788324.8 (22) Date of filing: 16.04.2021

(51) International Patent Classification (IPC):  C01B 32/336(2017.01) H01G 11/24(2013.01) C08G 8/32(2006.01) (52) Cooperative Patent Classification (CPC): A61K 8/365; A61K 8/345; A61K 8/676; A61K 8/42; A61Q 19/00; A61K 2800/31; A61K 9/107; A61K 9/0014; A61K 47/02 (86) International application number: PCT/US2021/027832 (87) International publication number: WO 2021/212077 (21.10.2021 Gazette 2021/42)

(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: 16.04.2020 US 202063010888 P 16.04.2020 US 202063010889 P 16.04.2020 US 202063010884 P 16.04.2020 US 202063010881 P 16.04.2020 US 202063010878 P (71) Applicant: Baek Clinical Inc. Los Angeles CA 90005 (US)

(72) Inventor: BAEK, Jihoon, P. Los Angeles, CA 90005 (US) (74) Representative: Elkington and Fife LLP  Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)