US PATENT SUBCLASS 313 / 551
.~ Gas generating

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

547  DF  HAVING HEATING MEANS TO CONTROL GAS/VAPOR, GAS OR VAPOR GENERATING MEANS, OR GETTER MEANS {4}
551.~ Gas generating

DEFINITION

Classification: 313/551

Gas generating:

(under subclass 547) Subject matter wherein the electric heating means is used to create a gas from material within the envelope.

SEE OR SEARCH THIS CLASS, SUBCLASS:

563, for a lamp or discharge device having gas generating material where no additional heating means is claimed.