(19)

(11)

EP 4 573 126 A2

(12)

(88) Date of publication A3: 11.04.2024 (43) Date of publication: 25.06.2025 Bulletin 2025/26 (21) Application number: 23769061.5 (22) Date of filing: 18.08.2023

(51) International Patent Classification (IPC):  C07K 16/28(2006.01) A61K 39/00(2006.01) C07K 14/715(2006.01) A61P 35/00(2006.01) (52) Cooperative Patent Classification (CPC): C07K 16/2866; C07K 2317/565; C07K 2317/76; C07K 2317/41; C07K 2317/732; C07K 2317/94; C07K 2317/24; A61P 35/00 (86) International application number: PCT/US2023/072462 (87) International publication number: WO 2024/040216 (22.02.2024 Gazette 2024/08)

(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 (30) Priority: 19.08.2022 US 202263399483 P (71) Applicant: Fibrogen, Inc. San Francisco, California 94133 (US)	(72) Inventors: BROUSSEAU, David T. Mill Valley, California 94941 (US) WALKINSHAW, Gail San Francisco, California 94158 (US) WITSCHI, Claudia San Francisco, California 94158 (US) (74) Representative: CH Kilger Anwaltspartnerschaft mbB  Fasanenstraße 29 10719 Berlin 10719 Berlin (DE)