US PATENT SUBCLASS 252 / 181.7
.~.~ Magnesium, alkali-metal, or alkaline-earth metal


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}
181.6  DF  .~ Metal or metal compound containing {1}
181.7.~.~ Magnesium, alkali-metal, or alkaline-earth metal


DEFINITION

Classification: 252/181.7

(under subclass 181.6) Materials which contain magnesium, an alkali metal, an alkaline earth metal, or a compound thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

181.4, for this subject material where the getter or gas or vapor material is generated from a reactive composition.

SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes, Compositions for Use

Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,

255+, for loose mixtures of metal or alloy powder. 420, Alloys or Metallic Compositions, appropriate subclasses for a single alloy or metallic composition in the form of a powder.