US PATENT SUBCLASS 428 / 328
.~.~ Heavy metal or aluminum or compound thereof

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}
328.~.~ Heavy metal or aluminum or compound thereof {1}
329  DF  .~.~.~> Iron oxide or aluminum oxide

DEFINITION

Classification: 428/328

(under subclass 323) Product in which the particles comprise (1) a free metal* having a specific gravity or density greater than 4, or (2) the free metal* aluminum or (3) a compound having the metal* of either (1) or (2) above in its molecule.