US PATENT SUBCLASS 313 / 641
.~.~.~.~.~ With rare gas

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  DF  .~.~ With metal vapor {1}
639  DF  .~.~.~ Mercury vapor {2}
640  DF  .~.~.~.~ And rare earth metal {1}
641.~.~.~.~.~ With rare gas

DEFINITION

Classification: 313/641

With rare gas:

(under subclass 640) Subject matter wherein the composition includes a rare gas.