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(11)

EP 4 188 889 A1

(12)

(43) Date of publication: 07.06.2023 Bulletin 2023/23 (21) Application number: 21755289.2 (22) Date of filing: 26.07.2021

(51) International Patent Classification (IPC):  C03C 3/091(2006.01) C03C 15/00(2006.01) C03C 3/097(2006.01) C03C 23/00(2006.01) (52) Cooperative Patent Classification (CPC): C03C 23/0025; C03C 15/00; C03C 3/091; C03C 3/097 (86) International application number: PCT/US2021/043104 (87) International publication number: WO 2022/026348 (03.02.2022 Gazette 2022/05)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 30.07.2020 US 202063059105 P (71) Applicant: Corning Incorporated Corning, New York 14831 (US)

(72) Inventors: CAI, Ling Painted Post, New York 14870 (US) HUANG, Tian Painted Post, New York 14870 (US) JIN, Yuhui Painted Post, New York 14870 (US) LEVESQUE, Daniel, Wayne, Jr. New York 14809 (US) MA, Lina Corning, New York 14830 (US) VANSELOUS, Heather, Nicole Corning, New York 14830 (US) WU, Jingshi 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)