US PATENT SUBCLASS 428 / 677
.~.~.~.~.~.~ Fe-base has 0.01-1.7% carbon (i.e., steel)

Current as of: June, 1999
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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}
655  DF  .~.~ Transition metal-base component {4}
668  DF  .~.~.~ Group VIII or IB metal-base component {10}
674  DF  .~.~.~.~ Cu-base component {2}
676  DF  .~.~.~.~.~ Next to Fe-base component {1}
677.~.~.~.~.~.~ Fe-base has 0.01-1.7% carbon (i.e., steel)

DEFINITION

Classification: 428/677

(under subclass 676) Subject matter in which the iron-base component contains 0.01-1.7 percent carbon.

(1) Note. The mere designation of the iron-base component as "steel" is sufficient for classification herein.