(19)

(11)

EP 4 798 993 A1

(12)

(43) Date of publication: 02.09.2026 Bulletin 2026/36 (21) Application number: 24799361.1 (22) Date of filing: 10.10.2024

(51) International Patent Classification (IPC):  G02B 6/02(2006.01) G02B 6/036(2006.01) (52) Cooperative Patent Classification (CPC): G02B 6/02042; G02B 6/03627; G02B 6/0365; G02B 6/03655 (86) International application number: PCT/US2024/050681 (87) International publication number: WO 2025/090294 (01.05.2025 Gazette 2025/18)

(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: 23.10.2023 US 202363545233 P (71) Applicant: Corning Incorporated Corning, New York 14831 (US)	(72) Inventors: MAKOVEJS, Sergejs Manchester M20 2WA (GB) TANDON, Pushkar Painted Post, New York 14870 (US) (74) Representative: Elkington and Fife LLP  Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)