US PATENT SUBCLASS 428 / 312.6
.~.~.~ Of silicon-containing material (e.g., glass, etc.)

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}
312.2  DF  .~.~ Inorganic matrix in void-containing component {3}
312.6.~.~.~ Of silicon-containing material (e.g., glass, etc.)

DEFINITION

Classification: 428/312.6

Of silicon-containing material (e.g., glass, etc.):

(under subclass 312.2) Subject matter wherein the inorganic matrix comprises elemental silicon or a compound formed of silicon, e.g., quartz, glass, silicon carbide, etc.