US PATENT SUBCLASS 428 / 366
.~.~ Including boron or compound thereof (not as steel)

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}
364  DF  .~ Rod, strand, filament or fiber {9}
366.~.~ Including boron or compound thereof (not as steel)

DEFINITION

Classification: 428/366

(under subclass 364) Product in which the rod, strand, filament or fiber comprises the element boron in either the free or combined state.

(1) Note. Excluded from this subclass is a rod, strand, filament or fiber which is composed of steel or other alloy or an intermetallic compound having boron as a constituent thereof; such products of sheet or other alloy will be found in subsequent subclasses on other features (see especially subclasses 379+). This subclass 366 is intended to be the locus for the high modulus boron filament or fiber.

SEE OR SEARCH CLASS

423, Chemistry of Inorganic Compounds,

276+, for a process of making free boron or a compound thereof or the product, per se, which does not claim structure enough to be placed in this Class 428.