US PATENT SUBCLASS 428 / 331
.~.~ Silicic material

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}
323  DF  .~ Including a second component containing structurally defined particles {7}
331.~.~ Silicic material

DEFINITION

Classification: 428/331

(under subclass 323) Product in which the particles comprise the element silicon (Si) in either its free or combined form.