US PATENT SUBCLASS 428 / 640
.~.~.~ Oxide of transition metal or Al

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}
639  DF  .~.~ O, S, or organic compound in metal component {1}
640.~.~.~ Oxide of transition metal or Al

DEFINITION

Classification: 428/640

(under subclass 639) Subject matter in which the dispersed nonmetal is the oxide of aluminum or a transition metal.

(1) Note. See the definition of subclass 655 for the scope of "transition metal".