US PATENT SUBCLASS 420 / 94
.~ Over 10 percent nickel 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

8  DF  FERROUS (I.E., IRON BASE) {24}
94.~ Over 10 percent nickel containing {4}
95  DF  .~.~> Cobalt containing
96  DF  .~.~> Molybdenum containing
97  DF  .~.~> Chromium containing
98  DF  .~.~> Over 1 percent silicon containing

DEFINITION

Classification: 420/94

Over 10 percent nickel containing:

(under subclass 89) Alloy or metallic composition which additionally contains more that 10 percent nickel.

(1) Note. Many of the alloys in this and indented subclasses are called "maraging" steels, which can be age hardened to very high levels of strength.