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EP 4 816 878 A1

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(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24898487.4 (22) Date of filing: 15.11.2024

(51) International Patent Classification (IPC):  G02F 1/1335(2006.01) H01Q 15/00(2006.01) G02F 1/29(2006.01) G02F 1/1333(2006.01) H01Q 3/44(2006.01) (52) Cooperative Patent Classification (CPC): H01Q 15/148; H01Q 15/002; G02F 1/133553; G02F 1/292 (86) International application number: PCT/US2024/056031 (87) International publication number: WO 2025/117202 (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 US 202363603329 P (71) Applicant: Corning Research & Development Corporation Corning, New York 14831 (US)

(72) Inventors: CHOI, Hyeng-cheul Seoul 05503 (KR) HUH, Jae-won Asan-city Chungcheongnam-do 31455 (KR) KANG, Boyoung Asan-si Chungcheongnam-do 31466 (KR) KANG, Byounggwan Seoul 06121 (KR) LEE, Changhyeong Asan-si Chungcheongnam-do 18392 (KR) (74) Representative: Sturm, Christoph  Patentanwälte Sturm Weilnau Franke Partnerschaft mbB Unter den Eichen 5 (Haus C-Süd) 65195 Wiesbaden 65195 Wiesbaden (DE)