US PATENT SUBCLASS 420 / 25
.~.~.~.~ In agent also containing silicon, rare earth, or alkaline earth metal

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

8  DF  FERROUS (I.E., IRON BASE) {24}
9  DF  .~ 1.7 percent or more carbon containing {2}
13  DF  .~.~ 2.7 percent or more carbon equivalent containing (i.e., cast iron) {7}
18  DF  .~.~.~ Processes of adding magnesium {7}
25.~.~.~.~ In agent also containing silicon, rare earth, or alkaline earth metal

DEFINITION

Classification: 420/25

In agent also containing silicon, rare earth or alkaline earth metal:

(under subclass 18) Processes wherein magnesium in the iron alloy in an agent which additionally contain at least one of silicon, scandium, yttrium, a lanthanide metal, calcium, strontium or barium.