US PATENT SUBCLASS 313 / 643
.~.~ One or more rare gases

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}
643.~.~ One or more rare gases

DEFINITION

Classification: 313/643

One or more rare gases:

(under subclass 637) Subject matter wherein the composition includes at least one noble gas.

(1) Note. Many of the patents includes a mixture of noble gases or gas of the noble type and another type gas.

(2) Note. The noble "gases" are helium, neon, argon, krypton and xenon.

SEE OR SEARCH CLASS

423, Chemistry of Inorganic Compounds,

262, for an inert or noble gas or compound thereof.