US PATENT SUBCLASS 428 / 661
.~.~.~.~ Diverse refractory group metal-base components: alternative to or next to each other*

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}
660  DF  .~.~.~ Refractory (Group IVB, VB, or VIB) metal-base component {3}
661.~.~.~.~ Diverse refractory group metal-base components: alternative to or next to each other*

DEFINITION

Classification: 428/661

(under subclass 660) Subject matter in which a component having 40 percent or more of Group IVB metal(s), or Group VB metal(s) or Group VIB metal(s) is adjacent a component having 40 percent or more metal from another of these groups, or in which the claims permit a component base to be selected from metals belonging to more than one of these groups.

(1) Note. Patents classified in this subclass are not cross-referenced to subclasses 660, 662 or 663.

(2) Note. The mere designation of a component base as a "refractory metal" is sufficient for placement in this subclass (661).

(3) Note. This subclass follows the classification and search rules for "Markush"- type subclasses set out in the definition of subclass 643, (1) Note and (2) Note.

SEE OR SEARCH THIS CLASS, SUBCLASS:

656, to complete a search for refractory metal-base components.

SEE OR SEARCH CLASS 148, Metal Treatment,

133, for a heat-treatment process of that class directed to a refractory solid metal or solid alloy.