US PATENT SUBCLASS 420 / 549
.~.~ Alkali, or alkaline earth metal containing

Current as of: June, 1999
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420 /   HD   ALLOYS OR METALLIC COMPOSITIONS

528  DF  ALUMINUM BASE {7}
548  DF  .~ Silicon containing {1}
549.~.~ Alkali, or alkaline earth metal containing

DEFINITION

Classification: 420/549

Alkali or alkaline earth metal containing:

(under subclass 548) Alloy, or metallic composition which contains at least one of the metals lithium, sodium, potassium, rubium, cesium, calcium, barium, or strontium.