US PATENT SUBCLASS 313 / 573
.~.~.~ Having specified envelope detail
Current as of:
June, 1999
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313 /
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ELECTRIC LAMP AND DISCHARGE DEVICES
567
DF
WITH GAS OR VAPOR
{24}
568
DF
.~ Having a particular total or partial pressure {4}
572
DF
.~.~ One torr thru 760 torr {2}
573
.~.~.~ Having specified envelope detail
DEFINITION
Classification: 313/573
Having specified envelope detail:
(under subclass 572) Subject matter wherein the envelope is defined in terms of some envelope feature.
(1) Note. The feature may be structural, or composition, or some optical feature, but not merely transparent, translucent, sealed or vitreous.
(2) Note. Included in this subclass are patents to both envelope detail and electrode detail.
SEE OR SEARCH THIS CLASS, SUBCLASS:
317+, for a lamp or discharge device having a particular envelope.
634+, for a gas or vapor discharge device envelope having particular structure including envelopes with a layer or coating or material.
636, for a gas or vapor discharge device having a particular envelope composition.