(19)

(11)

EP 1 144 324 A2

(12)

(88) Date of publication A3: 09.11.2000 (43) Date of publication: 17.10.2001 Bulletin 2001/42 (21) Application number: 99972023.8 (22) Date of filing: 09.12.1999

(51) International Patent Classification (IPC)7: C03B 37/014, C03B 13/04, C03C 3/06, C03C 13/04 (86) International application number: PCT/US9929/225 (87) International publication number: WO 0039/039 (06.07.2000 Gazette 2000/27)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 30.12.1998 US 114369 P (71) Applicant: CORNING INCORPORATED Corning, N.Y. 14831 (US)	(72) Inventors: DELISO, Evelyn, M. Corning, NY 14830 (US) MARLATT, Deborah, L. Addison, NY 14801 (US) PIERSON, Michelle, D. Painted Post, NY 14870 (US) TENNENT, Christine, L. Campbell, NY 14821 (US) (74) Representative: Marchant, James Ian et al Elkington and Fife,Prospect House,8 Pembroke Road Sevenoaks,Kent TN13 1XR Sevenoaks,Kent TN13 1XR (GB)