(19)

(11)

EP 4 568 639 A1

(12)

(43) Date of publication: 18.06.2025 Bulletin 2025/25 (21) Application number: 23757675.6 (22) Date of filing: 08.08.2023

(51) International Patent Classification (IPC):  A61K 8/04(2006.01) A61K 8/73(2006.01) A61Q 5/12(2006.01) A61K 8/31(2006.01) A61Q 5/06(2006.01) (52) Cooperative Patent Classification (CPC): A61Q 5/06; A61K 8/732; A61K 8/73; A61K 8/046; A61K 8/31; A61Q 5/12 (86) International application number: PCT/GB2023/052095 (87) International publication number: WO 2024/033633 (15.02.2024 Gazette 2024/07)

(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: 08.08.2022 GB 202211551 (71) Applicant: Innospec Limited Ellesmere Port, Cheshire CH65 4EY (GB)	(72) Inventor: GILES, Matthew Ellesmere Port Cheshire CH65 4EY (GB) (74) Representative: Appleyard Lees IP LLP  15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)