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(11)

EP 3 555 684 A1

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(43) Date of publication: 23.10.2019 Bulletin 2019/43 (21) Application number: 17881355.6 (22) Date of filing: 13.12.2017

(51) International Patent Classification (IPC):  G02B 6/44(2006.01) G02B 6/36(2006.01) G02B 6/04(2006.01) (86) International application number: PCT/US2017/065947 (87) International publication number: WO 2018/111953 (21.06.2018 Gazette 2018/25)

(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 TN (30) Priority: 13.12.2016 US 201662433439 P (71) Applicant: Corning Research And Development Corporation Corning, New York 14831 (US)	(72) Inventors: HURLEY, William Carl Hickory, North Carolina 28601 (US) JENSEN, Joseph Clinton Lawndale, North Carolina 28090 (US) JOHNSON, Kristine Alaina Keller, Texas 76238 (US) RIPUMAREE, Radawan Granite Falls, North Carolina 28630 (US) (74) Representative: Epping - Hermann - Fischer  Patentanwaltsgesellschaft mbH Schloßschmidstraße 5 80639 München 80639 München (DE)