US PATENT SUBCLASS 428 / 551
.~.~.~ Nonmetal 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}
546  DF  .~ Having metal particles {4}
548  DF  .~.~ Composite; i.e., plural, adjacent, spatially distinct metal components (e.g., layers, etc.) {5}
551.~.~.~ Nonmetal component {1}
552  DF  .~.~.~.~> Entirely inorganic

DEFINITION

Classification: 428/551

(under subclass 548) Subject matter in which a component is composed of nonmetal, containing no free metal.

(1) Note. The nonmetal component is in addition to the two contiguous metal-containing portions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

539.5, for single layer material having a continuous metal phase and an interengaged or interenmeshed nonmetal phase.

SEE OR SEARCH CLASS

416, Fluid Reaction Surfaces (i.e., Impellers), 241, for an impeller blade characterized by a specified structure other than shape which is not elsewhere classifiable; or a blade having a residual surface film, layer or continuous deposit, or, at least, partial impregnation; or a blade whose material composition is specifically set forth.