US PATENT SUBCLASS 423 / 492
.~.~ Refractory metal (Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, or W)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

462  DF  HALOGEN OR COMPOUND THEREOF {10}
491  DF  .~ Binary compound containing metal {6}
492.~.~ Refractory metal (Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, or W)

DEFINITION

Classification: 423/492

(under subclass 491) Products and processes in which the metal is of Group IV B, V B, or VI B, i.e., titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum or tungsten, commonly known as the refractory metals.