US PATENT SUBCLASS 428 / 548
.~.~ Composite; i.e., plural, adjacent, spatially distinct metal components (e.g., layers, 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}
546  DF  .~ Having metal particles {4}
548.~.~ Composite; i.e., plural, adjacent, spatially distinct metal components (e.g., layers, etc.) {5}
549  DF  .~.~.~> Fiber, asbestos, or cellulose in or next to particulate component
550  DF  .~.~.~> Porous component
551  DF  .~.~.~> Nonmetal component {1}
553  DF  .~.~.~> Nonparticulate metal component {5}
565  DF  .~.~.~> Nonmetal particles in a component

DEFINITION

Classification: 428/548

(under subclass 546) Subject matter which comprises at least two different contiguous layers or portions, which can be seen to be in different locations, both of which are, at least to some extent, of elemental metal, at least one of which has a continuous metallic matrix and at least one of which contains metal particles.

(1) Note. This subclass (548) is the locus for patents having two or more contiguous layers, all of which are of consolidated metal powder.

(2) Note. This subclass (548) includes a consolidated metal powder product, a portion of which has been impregnated with one metal, and another portion of which has been impregnated with a different metal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

411+, for corresponding nonmetallic* stock-materials*.

615+, for corresponding nonparticulate metallic stock.

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

228+, for a consolidated composition of metal powder and subclasses 255+ for unconsolidated metal powders.

148, Metal Treatment,

516, 537 for processes of treating layered solid or semi-solid metal stock or article to modify or maintain the internal physical structure (i.e., microstructure) or chemical properties of metal. If metal casting, fusion bonding, machining, or working is involved, there is a requirement for significant heat treatment as described in the Class 148 definition.

378, X-Ray or Gamma Ray Systems or Devices,

143+, for laminated electrodes designed to generate X-rays in which at least one layer contains metal particles.

419, Powder Metallurgy Processes, for processes of sintering powdered metal.

427, Coating Processes,

191, for processes of applying metal particles to a base to form a continuous coating, and subclasses 202+ for processes of applying superposed diverse coatings, at least one of which is particulate.