US PATENT SUBCLASS 428 / 655
.~.~ Transition 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.~.~ Transition metal-base component {4}
656  DF  .~.~.~> Alternative base metals from diverse categories*
657  DF  .~.~.~> Group IIB metal-base component {1}
660  DF  .~.~.~> Refractory (Group IVB, VB, or VIB) metal-base component {3}
668  DF  .~.~.~> Group VIII or IB metal-base component {10}

DEFINITION

Classification: 428/655

(under subclass 615) Subject matter having a component which contains 40 percent or more of a transition metal or a combination of transition metals.

(1) Note. The transition elements, as defined in the "Condensed Chemical Dictionary", 7th Edition, Reinhold Publishing Company, 1966, page 958, are:

"Elements in which an inner electron shell, rather than an outer shell, is partially filled. In the periodic table they include elements 21 through 30 (scandium through zinc), 39 through 48 (yttrium through cadmium), 57 through 80 (lanthanum through mercury), and 89 through 103 (actinium through lawrencium). They are all metals and most possess colored ions, variable valency, have a tendency to form complexes, and have large magnetic moments."

Thus, the transition elements include the metals of the periodic table groups listed in the subclasses indented hereunder, as well as those covered in (2) Note below.

(2) Note. This subclass (655) is the locus for composite

materials having a component which is 40 percent or more of the Group IIIB metals (Sc, Y, the lanthanides and the actinides) and/or the Group VIIB metals (Mn, Tc, and Re).

(3) Note. "Franklinite" is considered to be a Mn-base alloy. SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,

245+, for consolidated metal powder compositions in which the base metal is one or more transition metals.

376, Induced Nuclear Reactions: Processes, Systems, and Elements,

455, for a structured, layered, canned or jacketed nuclear fuel component.