Appeal No. 95-3288
Application 08/148,020
FLEMING, Administrative Patent Judge.
DECISION ON APPEAL
This is a decision on appeal from the final rejection
of claims 1, 5 through 7, 9 through 13, 15 through 18 and 22
through 28, all of the claims pending in the present application.
Claims 2 through 4, 8, 14, 19 through 21 and 29 have been
canceled.
The invention relates to an improved shield for high
pressure sodium vapor lamps. More particularly, the invention
relates to an improved shielding of the getter using a ceramic
disk located between the arc tube and getter. The ceramic disk
shields the getter from radiation emitted by the arc tube. On
page 11 of the specification, Appellants disclose that the shield
is shown as element 88 in Figure 2 and is optically opaque, heat-
resistant and thermally stable, electrically non-conductive and
non-outgassing. Appellants disclose on page 12 of the
specification, that shield 88 is shown in greater detail in
Figure 4 and is made of a sintered polycrystalline alumina
ceramic disk. The shield is made about 1mm thick of sintered
polycrystalline alumina of from 94-96% Al O with the remainder
23
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