US PATENT SUBCLASS 313 / 553
WITH GETTER

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

553WITH GETTER {8}
554  DF  .~> Plural {1}
556  DF  .~> And vapor generator
557  DF  .~> Incandescent lamp type
558  DF  .~> Electrode includes getter, supports getter, or is connected to getter
559  DF  .~> Mounted on electrode support
560  DF  .~> With structure to direct or shield from getter
561  DF  .~> With contained getter
562  DF  .~> Gas or vapor device type

DEFINITION

Classification: 313/553

WITH GETTER:

(under the class definition) Subject matter including a lamp or discharge device having a gas or vapor within an envelope detrimental to the operation of the lamp or discharge device and a material to remove the detrimental gas or vapor or lessen the amount of the detrimental gas or vapor in the atmosphere of the envelope.

(1) Note. The subcombination of an envelope and a getter within the envelope will be placed in this group of

subclasses.

(2) Note. The getter receives heat from the filament of a lamp, a cathode heater of a tube, or the electrical discharge of a tube.

(3) Note. Getters may be of the absorption, adsorption, chemical reaction type or by any means solely within the envelope.

(4) Note. Support structure for a getter or with a getter where the only disclosure is for an electric lamp or discharge device will be placed with the appropriate subclass as a subcombination not elsewhere classified.

(5) Note. Getter materials for vacuum tubes are classified in this subclass.