US PATENT SUBCLASS 420 / 405
.~ Lanthanide containing


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

402  DF  MAGNESIUM BASE {6}
405.~ Lanthanide containing {1}
406  DF  .~.~> Zirconium containing


DEFINITION

Classification: 420/405

Lanthanide containing:

(under subclass 402) Alloy, or metallic composition which additionally contains at least one of the metals lanthanum through lutetium, i.e., atomic numbers 57 through 71.