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(11)

EP 3 426 616 A1

(12)

(43) Date of publication: 16.01.2019 Bulletin 2019/03 (21) Application number: 17713813.8 (22) Date of filing: 08.03.2017

(51) International Patent Classification (IPC):  C03C 8/02(2006.01) C03C 8/08(2006.01) C03C 27/06(2006.01) C03C 8/04(2006.01) C03C 8/24(2006.01) (86) International application number: PCT/US2017/021238 (87) International publication number: WO 2017/156048 (14.09.2017 Gazette 2017/37)

(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: MA MD (30) Priority: 10.03.2016 US 201615066704 (71) Applicant: Corning Incorporated Corning, New York 14831 (US)	(72) Inventors: DABICH, Leonard Charles II Painted Post, New York 14870 (US) LOGUNOV, Stephan Lvovich Corning, New York 14830 (US) QUESADA, Mark Alejandro Horseheads, New York 14845 (US) STRELTSOV, Alexander Mikhailovich Corning, New York 14830 (US) (74) Representative: Elkington & Fife LLP  Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)