US PATENT SUBCLASS 313 / 550
.~ Vapor 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}
550.~ Vapor generating

DEFINITION

Classification: 313/550

Vapor generating:

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

564+, for a lamp or discharge device having vapor generating material where no additional heating means is claimed.