US PATENT SUBCLASS 420 / 31
.~.~.~.~ Adding sulfur, selenium or tellurium

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}
29  DF  .~.~.~ Processes {4}
31.~.~.~.~ Adding sulfur, selenium or tellurium

DEFINITION

Classification: 420/31

Adding sulfur, selenium or tellurium:

(under subclass 29) Process which includes a step of adding one or more of sulfur, selenium or tellurium to the alloy or metallic composition.