Compositions: coating or plastic – Coating or plastic compositions – Inorganic materials only containing at least one metal atom
Reexamination Certificate
2007-03-27
2007-03-27
Koslow, C. Melissa (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Inorganic materials only containing at least one metal atom
C106S286300, C362S514000, C362S341000, C313S113000, C359S661000
Reexamination Certificate
active
10862620
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:
patent: 4305016 (1981-12-01), Schmidt
patent: 6270237 (2001-08-01), Scholler
patent: 1193816 (1970-06-01), None
patent: 1334329 (1973-10-01), None
Mudra István
Szemere Péter
Fay Sharpe LLP
General Electric Company
Koslow C. Melissa
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