(19)

(11)

EP 4 816 478 A2

(12)

(88) Date of publication A3: 17.07.2025 (43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24822068.3 (22) Date of filing: 21.11.2024

(51) International Patent Classification (IPC):  C09B 67/46(2006.01) G02F 1/167(2019.01) (52) Cooperative Patent Classification (CPC): C09B 67/009; G02F 2001/1678; G02F 1/1675; G02F 1/1681 (86) International application number: PCT/US2024/056851 (87) International publication number: WO 2025/117316 (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: 30.11.2023 US 202363604274 P (71) Applicant: E Ink Corporation Billerica, Massachusetts 01821-4165 (US)	(72) Inventor: BZOWEJ, Eugene Billerica, Massachusetts 01821-4165 (US) (74) Representative: Harris, Jennifer Lucy  Kilburn & Strode LLP Lacon London 84 Theobalds Road London WC1X 8NL London WC1X 8NL (GB)