(19)

(11)

EP 0 674 723 A1

(12)

(43) Date of publication: 04.10.1995 Bulletin 1995/40 (21) Application number: 94904442.0 (22) Date of filing: 14.12.1993

(51) International Patent Classification (IPC):  C04B 41/ 87( . ) C23C 18/ 12( . ) C23C 28/ 04( . ) C04B 41/ 50( . ) C23C 24/ 08( . ) (86) International application number: PCT/US1993/012150 (87) International publication number: WO 1994/013853 (23.06.1994 Gazette 1994/14)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 17.12.1992 US 19920991929 (71) Applicant: UNITED TECHNOLOGIES CORPORATION Hartford, CT 06101 (US)	(72) Inventors: XIAO, Youming Storrs, CT 06268 (US) TAN, Beng Jit Storrs, CT 06268 (US) SUIB, Steven, Lawrence Storrs, CT 06268 (US) GALASSO, Francis, S. Manchester, CT 06040 (US) (74) Representative: Klunker . Schmitt-Nilson . Hirsch  Winzererstrasse 106 D-80797 München D-80797 München (DE)