US PATENT SUBCLASS 428 / 406
.~.~.~.~ Glass particles or spheres

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

357  DF  COATED OR STRUCTUALLY DEFINED FLAKE, PARTICLE, CELL, STRAND, STRAND PORTION, ROD, FILAMENT, MACROSCOPIC FIBER OR MASS THEREOF {5}
402  DF  .~ Particulate matter (e.g., sphere, flake, etc.) {3}
403  DF  .~.~ Coated {2}
404  DF  .~.~.~ Silicic or refractory material containing (e.g., tungsten oxide, glass, cement, etc.) {2}
406.~.~.~.~ Glass particles or spheres

DEFINITION

Classification: 428/406

(under subclass 404) Product in which the particulate matter comprises pieces of the fused mixture commonly known as glass* and as defined in subclass 426.

(1) Note. The glass* particles or spheres may have been enlarged or foamed or may contain channels or voids.

SEE OR SEARCH THIS CLASS, SUBCLASS:

312, for a composite product in which one component is either porous or cellular and may comprise glass* foam.

404, for particulate matter in which glass* is present as the coating thereon.