US PATENT SUBCLASS 501 / 97.4
.~.~.~.~ Composites (continuous matrix with dispersed phase)

Current as of: June, 1999
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501 /   HD   COMPOSITIONS: CERAMIC

1  DF  CERAMIC COMPOSITIONS {15}
94  DF  .~ Refractory {8}
96.1  DF  .~.~ Boride, silicide, nitride, oxynitride, carbonitride, or oxycarbonitride containing {7}
97.1  DF  .~.~.~ Silicon nitride containing (Si3N4) {2}
97.4.~.~.~.~ Composites (continuous matrix with dispersed phase)

DEFINITION

Classification: 501/97.4

Composites (continuous matrix with dispersed phase):

(under subclass 97.1) Compositions characterized by having a dispersed phase in a continuous matrix, wherein silicon nitride may be either the dispersed phase or the continuous matrix, or may be in either the dispersed phase or in the continuous matrix.