US PATENT SUBCLASS 428 / 310.5
.~.~ With gradual property change within a component

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

221  DF  WEB OR SHEET CONTAINING STRUCTURALLY DEFINED ELEMENT OR COMPONENT {9}
304.4  DF  .~ Composite having voids in a component (e.g., porous, cellular, etc.) {14}
310.5.~.~ With gradual property change within a component

DEFINITION

Classification: 428/310.5

With gradual property change within a component:

(under subclass 304.4) Subject matter wherein a component has a property, e.g., density, composition, pore size, hardness,

concentration of ingredients, etc., which varies gradually from one surface to another surface of the same component.

(1) Note. The change of property usually is so gradual that no area within the component can be identified as an interface between components.

SEE OR SEARCH THIS CLASS, SUBCLASS:

547, and 610, for similar subject matter which is all metal or has adjacent metals.