EP 0192290 B1 19890524 - ELECTRIC LAMP HAVING A COLOURED LAMP VESSEL
Title (en)
ELECTRIC LAMP HAVING A COLOURED LAMP VESSEL
Publication
Application
Priority
- NL 8500295 A 19850204
- NL 8503477 A 19851218
Abstract (en)
[origin: EP0192290A1] An electric lamp having an electrostatically applied powder layer (2) on the wall of the lamp vessel (1) according to the invention contains MgO as an addition to this powder layer. The addition prevents discolouring of Cd-containing pigments in the powder layer and in the case of incandescent lamps results in lengthening of the life.
IPC 1-7
IPC 8 full level
H01J 61/40 (2006.01); H01K 1/32 (2006.01)
CPC (source: EP)
H01J 61/40 (2013.01); H01K 1/32 (2013.01)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0192290 A1 19860827; EP 0192290 B1 19890524; CN 1004954 B 19890802; CN 86100621 A 19860730; DE 3663606 D1 19890629; HU 192524 B 19870629; HU T39534 A 19860929; JP S61183865 A 19860816; NL 8503477 A 19860901
DOCDB simple family (application)
EP 86200141 A 19860203; CN 86100621 A 19860201; DE 3663606 T 19860203; HU 45386 A 19860131; JP 1920686 A 19860201; NL 8503477 A 19851218