US PATENT SUBCLASS 428 / 638
.~.~.~.~ Fe, containing 0.01-1.7% carbon (i.e., steel)

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

Internet Version by PATENTEC © 1999      Terms of Use


428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

544  DF  ALL METAL OR WITH ADJACENT METALS {31}
615  DF  .~ Composite; i.e., plural, adjacent, spatially distinct metal components (e.g., layers, joint, etc.) {15}
636  DF  .~.~ Adjacent, identical composition, components {1}
637  DF  .~.~.~ Group VIII or IB metal-base {1}
638.~.~.~.~ Fe, containing 0.01-1.7% carbon (i.e., steel)

DEFINITION

Classification: 428/638

(under subclass 637) Subject matter in which the metal is iron and the components contain 0.01 to 1.7% carbon.

(1) Note. Patents classified herein are not cross-referenced to subclass 683 where the components are necessarily identical.

SEE OR SEARCH THIS CLASS, SUBCLASS:

682+, for composite metallic stock-material* having adjacent iron-base components of differing composition.