US PATENT SUBCLASS 428 / 637
.~.~.~ Group VIII or IB metal-base

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}
636  DF  .~.~ Adjacent, identical composition, components {1}
637.~.~.~ Group VIII or IB metal-base {1}
638  DF  .~.~.~.~> Fe, containing 0.01-1.7% carbon (i.e., steel)

DEFINITION

Classification: 428/637

(under subclass 636) Subject matter in which the identical adjacent components contain more than 40% of one or more metals from Group VIII or IB of the periodic table, that is, cobalt, copper, gold, iridium, iron, nickel, osmium, palladium, platinum, rhodium, ruthenium and/or silver.

(1) Note. Where the adjacent components are always identical, e.g., are not described in terms of overlapping ranges or constituents, patents classified herein are not cross-referenced to subclass 675.