US PATENT SUBCLASS 313 / 548
.~ Incandescent lamp gettering


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}
548.~ Incandescent lamp gettering


DEFINITION

Classification: 313/548

Incandescent lamp gettering:

(under subclass 547) Subject matter wherein the electric heating means is used for the purpose of heating getter material within the envelope to remove unwanted gas or vapor from the gas or vapor within the envelope of an incandescent lamp.

SEE OR SEARCH THIS CLASS, SUBCLASS:

315+, for an incandescent lampgenerally.

557, for an incandescent lamp and getter including getter

material where no additional heating means to heat the getter is claimed.

578+, for a gas or vapor incandescent lamp.