US PATENT SUBCLASS 313 / 547
HAVING HEATING MEANS TO CONTROL GAS/VAPOR, GAS OR VAPOR GENERATING MEANS, OR GETTER MEANS

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

547HAVING HEATING MEANS TO CONTROL GAS/VAPOR, GAS OR VAPOR GENERATING MEANS, OR GETTER MEANS {4}
548  DF  .~> Incandescent lamp gettering
549  DF  .~> Discharge device gettering
550  DF  .~> Vapor generating
551  DF  .~> Gas generating

DEFINITION

Classification: 313/547

HAVING HEATING MEANS TO CONTROL GAS/VAPOR, GAS OR VAPOR GENERATING MEANS OR GETTER MEANS:

(under the class definition) Subject matter which includes an envelope for a lamp or discharge device, at least an electrode within the envelope and electric heating means to maintain or control the temperature or the pressure of gas or vapor within certain limits within the envelope, to cause the generation of gas or vapor within the envelope or to control a getter within the envelope to remove a gas or vapor from the gas to vapor within the tube.

SEE OR SEARCH THIS CLASS, SUBCLASS:

552, for a gas or vapor lamp of discharge device having pressure control of the gas or vapor generally.

553+, for a lamp or discharge device having a getter.