US PATENT SUBCLASS 428 / 660
.~.~.~ 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}
655  DF  .~.~ Transition metal-base component {4}
660.~.~.~ Refractory (Group IVB, VB, or VIB) metal-base component {3}
661  DF  .~.~.~.~> Diverse refractory group metal-base components: alternative to or next to each other*
662  DF  .~.~.~.~> Group VB metal-base component
663  DF  .~.~.~.~> Group VIB metal-base component {3}

DEFINITION

Classification: 428/660

(under subclass 655) Subject matter in which the composite has a component which is 40 percent or more of one or more metals from Groups IVB, VB or VIB of the periodic table.

(1) Note. This subclass (660) is the locus for components having a base of one or more Group IVB metals (titanium, hafnium or zirconium).

SEE OR SEARCH THIS CLASS, SUBCLASS:

656, and 661, to complete a search for Ti-, Zr-, and Hf-base

components.

SEE OR SEARCH CLASS

148, Metal Treatment, 133, for heat treatment methods of that class directed to refractory metals.