US PATENT SUBCLASS 420 / 443
.~.~ Rare earth, magnesium or alkaline earth metal containing

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


420 /   HD   ALLOYS OR METALLIC COMPOSITIONS

441  DF  NICKEL BASE {6}
442  DF  .~ Chromium containing {5}
443.~.~ Rare earth, magnesium or alkaline earth metal containing

DEFINITION

Classification: 420/443

Rare earth, magnesium or alkaline earth metal containing:

(under subclass 442) Alloy, or metallic composition which additionally contains at least one metal selected from scandium yttrium, lanthanium through lutetium (i.e., atomic numbers 57-71), magnesium, calcium, strontium, or barium.