US PATENT SUBCLASS 420 / 564
.~ Alkali, alkaline earth metal or magnesium containing

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

563  DF  LEAD BASE {8}
564.~ Alkali, alkaline earth metal or magnesium containing {1}
565  DF  .~.~> Tin containing

DEFINITION

Classification: 420/564

Alkali, alkaline earth metal or magnesium containing:

(under subclass 563) Alloy, or metallic composition which additionally contains at least one of the metals, lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, or barium.