US PATENT SUBCLASS 428 / 669
.~.~.~.~ Group IB metal-base component alternative to platinum group metal-base component (e.g., precious metal, etc.)

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}
668  DF  .~.~.~ Group VIII or IB metal-base component {10}
669.~.~.~.~ Group IB metal-base component alternative to platinum group metal-base component (e.g., precious metal, etc.)

DEFINITION

Classification: 428/669

(under subclass 668) Subject matter in which a component of a composite comprises 40 percent or more of a metal which may be either a Group IB metal or a platinum-group metal.

(1) Note. See the definition of subclass 670 for the scope of "platinum-group metal".

(2) Note. Where the selection of the base metal is

restricted to a metal within a Group IB or within the platinum group, the patent is not placed here.

(3) Note. Where a composite has a component made of at least three metals, none of which is present as 40 percent or more, but in which a combination which necessarily includes a Group IB metal and a platinum group metal does total 40 percent or more, the patent is classified here.

(4) Note. Patents classified here are not cross-referenced to subclasses 670+, 672, 673, or 674.

(5) Note. The designation of the base metal as merely a "precious metal" or a "noble metal" in any claim is sufficient for classification here, despite (2) Note and (3) Note. (6) Note. The classification and search rules for this subclass are the same as the "Markush"-type subclass rules 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 components having a base of Group IB or platinum metals.

SEE OR SEARCH CLASS

63, Jewelry, appropriate subclasses for articles, generally composed of precious metals, intended to be worn upon the person as ornaments.

427, Coating Processes,

125, for a process of coating a base with silver, gold, platinum, or palladium to produce an electrical product.