(19)

(11)

EP 4 816 678 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24816742.1 (22) Date of filing: 27.11.2024

(51) International Patent Classification (IPC):  F01N 3/22(2006.01) F01N 9/00(2006.01) F01N 3/32(2006.01) (52) Cooperative Patent Classification (CPC): F01N 3/22; F01N 3/32; F01N 9/00; F01N 2270/00; F01N 2900/1402 (86) International application number: PCT/EP2024/083774 (87) International publication number: WO 2025/114368 (05.06.2025 Gazette 2025/23)

(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: GE KH MA MD TN (30) Priority: 28.11.2023 EP 23212496 (71) Applicant: Aurobay Sweden AB 417 55 Göteborg (SE)	(72) Inventor: ROLANDSON, Ola 468 90 Vänersnäs (SE) (74) Representative: Zacco Sweden AB  P.O. Box 5581 Löjtnantsgatan 21 114 85 Stockholm 114 85 Stockholm (SE)