US PATENT SUBCLASS 313 / 638
.~.~ With metal vapor

Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

567  DF  WITH GAS OR VAPOR {24}
637  DF  .~ With particular gas or vapor {2}
638.~.~ With metal vapor {1}
639  DF  .~.~.~> Mercury vapor {2}

DEFINITION

Classification: 313/638

With metal vapor:

(under subclass 637) Subject matter wherein the composition includes a metal vapor.

SEE OR SEARCH CLASS

423, Chemistry of Inorganic Compounds,

155+, for an alkaline earth metal, subclasses 179+ for an alkali metal, compound, subclasses 99+ for mercury containing compound, and subclass 263 for rare earth compound.