Composition for opaque coating, lamp with coating, and...

Details Composition for opaque coating, lamp with coating, and... Composition for opaque coating, lamp with coating, and...

2007-02-15

2008-08-19

Koslow, C. Melissa (Department: 1793)

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

C106S456000, C106S404000, C106S286300, C106S286500, C106S287230, C427S106000, C427S108000, C427S110000, C427S168000, C427S165000, C427S169000

Reexamination Certificate

active

07413600

ABSTRACT:
A composition for the manufacture of an opaque silvery coating on a glass surface is provided. The composition comprises a mixture of at least two metal powders. The metal powder mixture contains carbonyl iron and aluminum, and a carrier liquid for forming a suspension of the metal powder mixture. A method for manufacturing an opaque silvery coating for a lamp having a glass envelope is also provided. In the method, a suspension comprising a mixture of carbonyl iron and aluminum powders in a carrier liquid is applied onto the envelope of the lamp. The suspension is dried, and thereafter the composition remaining from the suspension is burned at a temperature above 500° C. A lamp with a glass envelope and a single layer opaque coating covering at least a part of the glass envelope is also disclosed. The opaque coating comprises 50 to 80 weight % carbonyl iron and 20 to 50 weight % elementary aluminum.

REFERENCES:
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patent: 4305016 (1981-12-01), Schmidt
patent: 4965039 (1990-10-01), Schuetz
patent: 6221138 (2001-04-01), Kenny
patent: 6270237 (2001-08-01), Scholler
patent: 6666913 (2003-12-01), Hirano et al.
patent: 1193816 (1970-06-01), None
patent: 1334329 (1973-10-01), None
patent: 52-40740 (1977-03-01), None

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