(19)

(11)

EP 2 367 766 A1

(12)

(43) Date of publication: 28.09.2011 Bulletin 2011/39 (21) Application number: 08875801.6 (22) Date of filing: 26.11.2008

(51) International Patent Classification (IPC):  C03B 23/035(2006.01) (86) International application number: PCT/IB2008/003701 (87) International publication number: WO 2010/061238 (03.06.2010 Gazette 2010/22)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR (71) Applicant: Corning Incorporated Corning, NY 14831 (US)	(72) Inventors: FREDHOLM, Allan, Mark F-77850 Hericy (FR) PIERRON, Christophe F-77210 Avon (FR) DANNOUX, Thierry F-77210 Avon (FR) HERVE, Patrick F-77210 Avon (FR) (74) Representative: Le Roux, Martine et al Cabinet Beau de Loménie 158, rue de l'Université 75340 Paris Cedex 07 75340 Paris Cedex 07 (FR)