US PATENT SUBCLASS 252 / 181.5
.~ Gaseous getters

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

181.1  DF  GETTERS OR GAS OR VAPOR GENERATING MATERIALS FOR ELECTRIC LAMPS, ELECTRIC SPACE DISCHARGE DEVICES, AND SIMILAR DEVICES {4}
181.5.~ Gaseous getters

DEFINITION

Classification: 252/181.5

(under subclass 181.1) Getters where the getter material is normally gaseous.

(1) Note. This subclass does not include materials which are rendered gaseous or vaporous by treating a substance which is normally nongaseous or vaporous.

SEE OR SEARCH THIS CLASS, SUBCLASS:

372+, for gaseous compositions.