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(11)

EP 1 603 851 A1

(12)

(43) Date of publication: 14.12.2005 Bulletin 2005/50 (21) Application number: 03816827.4 (22) Date of filing: 09.09.2003

(51) International Patent Classification (IPC)7: C04B 41/86 (86) International application number: PCT/US2003/028152 (87) International publication number: WO 2004/096733 (11.11.2004 Gazette 2004/46)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 26.03.2003 US 458505 P 01.05.2003 US 467013 P 16.06.2003 US 478876 P (71) Applicant: Saint-Gobain Ceramics and Plastics, Inc. Worcester, MA 01615 (US)	(72) Inventor: BRYDEN, Raymond, H. Holden, MA 01520 (US) (74) Representative: Leidescher, Thomas et al Zimmermann & Partner, Postfach 33 09 20 80069 München 80069 München (DE)