US PATENT SUBCLASS 252 / 181.6
.~ Metal or metal compound containing

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

DEFINITION

Classification: 252/181.6

(under subclass 181.1) Materials which contain a metal or metal compound.

SEE OR SEARCH THIS CLASS, SUBCLASS:

181.1, see (2) Note, for the line between this subclass and the classes which provide for metals, alloys, and metal compounds.

SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, appropriate subclasses for processes of making metals, and

228+, for consolidated and 255+ for loose metal particle compositions.

420, Alloys or Metallic Compositions, appropriate subclasses for alloys or metallic compositions, per se. 423, Chemistry of Inorganic Compounds, appropriate subclasses for metal containing inorganic compounds, per se.

556, Organic Compounds, appropriate subclasses for carbon compounds which contain a metal, see

1+, where the compound contains a heavy metal and subclasses 170+ where the compound contains aluminum.