US PATENT SUBCLASS 428 / 651
.~.~.~ Next to refractory (Group IVB, VB, or VIB) metal-base component

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}
650  DF  .~.~ Al-base component {3}
651.~.~.~ Next to refractory (Group IVB, VB, or VIB) metal-base component

DEFINITION

Classification: 428/651

(under subclass 650) Subject matter in which the aluminum-base component is adjacent a component containing 40 percent or more of one or more of the metals in Groups IVB, VB, or VIB.

(1) Note. For a listing of metals contained in the above-listed groups, see the definitions of subclasses 660, 662 and 663.

(2) Note. Patents classified herein are not cross-referenced to subclasses 660+ on the basis of the Al/refractory-metal interface.

SEE OR SEARCH CLASS

148, Metal Treatment,

133, for a heat treatment of that class involving a refractory-metal-base component.