(19)

(11)

EP 2 019 946 A2

(12)

(88) Date of publication A3: 10.04.2008 (43) Date of publication: 04.02.2009 Bulletin 2009/06 (21) Application number: 07794595.4 (22) Date of filing: 04.05.2007

(51) International Patent Classification (IPC):  F23Q 7/00(2006.01) (86) International application number: PCT/US2007/010975 (87) International publication number: WO 2007/130658 (15.11.2007 Gazette 2007/46)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 04.05.2006 US 798266 P (71) Applicant: Saint-Gobain Ceramics and Plastics, Inc. Worcester, MA 01615-0008 (US)	(72) Inventors: YU, Taehwan Sudbury, MA 01776 (US) ANNAVARAPU, Suresh Somerville, MA 02145 (US) (74) Representative: Zimmermann & Partner  Isartorplatz 1 80331 München 80331 München (DE)