(19)

(11)

EP 1 119 525 A2

(12)

(88) Date of publication A3: 31.08.2000 (43) Date of publication: 01.08.2001 Bulletin 2001/31 (21) Application number: 99941109.3 (22) Date of filing: 11.08.1999

(51) International Patent Classification (IPC)7: C03C 17/25, C03C 17/00, B05B 15/04, C23C 14/04, C03C 17/34 (86) International application number: PCT/US9918/415 (87) International publication number: WO 0009/457 (24.02.2000 Gazette 2000/08)

(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: 13.08.1998 US 96415 P 17.03.1999 US 270701 17.03.1999 US 270702 (71) Applicant: PPG Industries Ohio, Inc. Cleveland, OH 44411 (US)

(72) Inventors: KUTILEK, Luke, A. Oakmont, PA 15139 (US) SCRIVEN, Roger, L. Gibsonia, PA 15044 (US) ATHEY, Patricia, Ruzakowski Pittsburg, PA 15238 (US) GREENBERG, Charles, B. Murrysville, PA 15668 (US) SLOBODNIK, John, B. New Kensington, PA 15068 (US) (74) Representative: Sternagel, Fleischer, Godemeyer & PartnerPatentanwälte  Braunsberger Feld 29 51429 Bergisch Gladbach 51429 Bergisch Gladbach (DE)