(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.
