Electrical discharge lamp envelope

Details Electrical discharge lamp envelope Electrical discharge lamp envelope

1982-03-29

1982-11-23

Hoffman, James R.

Coating processes

Coating by vapor, gas, or smoke

Base includes an inorganic compound containing silicon or...

427107, 427167, 4272553, 427444, B05D 302, H01J 700

Patent

active

043605460

ABSTRACT:
A lamp envelope comprised of silica glass having a SiO.sub.2 --B.sub.2 O.sub.3 glass layer on an inner surface thereof is coated on the free surface of such SiO.sub.2 --B.sub.2 O.sub.3 glass layer with a protective layer comprised of a silica glass having a lower B.sub.2 O.sub.3 amount relative to the B.sub.2 O.sub.3 amount in the SiO.sub.2 --B.sub.2 O.sub.3 glass layer.

REFERENCES:
patent: 2030389 (1936-02-01), Navias
patent: 2030390 (1936-02-01), Navias

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