US PATENT SUBCLASS 428 / 149
.~.~.~ Silicon containing

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

98  DF  STRUCTURALLY DEFINED WEB OR SHEET (E.G., OVERALL DIMENSION, ETC.) {20}
141  DF  .~ Continuous and nonuniform or irregular surface on layer or component (e.g., roofing, etc.) {5}
143  DF  .~.~ Particulate matter {5}
149.~.~.~ Silicon containing {1}
150  DF  .~.~.~.~> Sand, clay, or crushed rock or slate

DEFINITION

Classification: 428/149

(under subclass 143) Product in which the pieces or granules comprises the element silicon in either its uncombined or compound state.