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(11)

EP 4 816 325 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24898612.7 (22) Date of filing: 26.11.2024

(51) International Patent Classification (IPC):  C03B 1/02(2006.01) C03C 13/04(2006.01) C03C 3/32(2006.01) (52) Cooperative Patent Classification (CPC): C03B 19/025; C03B 2201/86; B02C 18/18; B02C 18/22; B02C 18/225; B02C 2018/2208 (86) International application number: PCT/US2024/057386 (87) International publication number: WO 2025/117496 (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: 29.11.2023 US 202363603797 P 25.11.2024 US 202463724647 P (71) Applicant: Corning Incorporated Corning, New York 14831 (US)

(72) Inventors: BRADLEY, Michael Dale New York 14824 (US) BROWN, Jason Allen Elmira, New York 14903 (US) LINDBERG, George Paul Corning, New York 14830 (US) TEBO, III, Thomas Madison Horseheads, New York 14845 (US) VASILAKOS, Kevin Andrew 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)