EP 1138054 A1 20011004 - BULB HAVING INTERIOR SURFACE COATED WITH RARE EARTH OXIDE
Title (en)
BULB HAVING INTERIOR SURFACE COATED WITH RARE EARTH OXIDE
Title (de)
KOLBEN MIT SELTENERDOXYD-BESCHICHTETE INNENOBERFLÄCHE
Title (fr)
BULBE A REVETEMENT INTERIEUR EN OXYDE DE METAL DE TERRES RARES
Publication
Application
Priority
- US 9927075 W 19991112
- US 10844098 P 19981113
- US 13097999 P 19990426
Abstract (en)
[origin: WO0030142A1] A lamp bulb (1) includes a light transmissive envelope (2), a fill material disposed inside the envelope including a rare earth metal which forms a plasma discharge when excited, and a coating (3) disposed on an interior surface of the envelope which inhibits reaction between the plasma discharge and the envelope (2), wherein the coating (3) comprises an oxide of the same rare earth metal of the fill material. A process for coating the interior of a lamp bulb envelope (2) includes preparing a sol gel solution having a precursor of the desired coating, introducing the sol gel solution into a lamp preform, distributing the sol gel along an interior surface of the bulb, and drying and firing the sol gel to obtain the coated bulb.
IPC 1-7
IPC 8 full level
H01J 9/395 (2006.01); H01J 9/20 (2006.01); H01J 9/22 (2006.01); H01J 9/40 (2006.01); H01J 61/35 (2006.01); H01J 65/04 (2006.01)
CPC (source: EP KR)
H01J 9/20 (2013.01 - EP); H01J 61/35 (2013.01 - EP KR); H01J 65/04 (2013.01 - EP)
Citation (search report)
See references of WO 0030142A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0030142 A1 20000525; AU 2149900 A 20000605; CA 2347263 A1 20000525; CN 1325538 A 20011205; EP 1138054 A1 20011004; HU P0104749 A2 20020328; HU P0104749 A3 20020429; IL 142077 A0 20020310; JP 2002530806 A 20020917; KR 20010079994 A 20010822
DOCDB simple family (application)
US 9927075 W 19991112; AU 2149900 A 19991112; CA 2347263 A 19991112; CN 99813065 A 19991112; EP 99965809 A 19991112; HU P0104749 A 19991112; IL 14207799 A 19991112; JP 2000583058 A 19991112; KR 20017004286 A 20010404